19997988400

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{947}}^1$

素因数の和:1140

約数の個数: 240

約数和(自身を含む): 53874551808

約数和(自身を除く): 33876563408

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 31, 40, 50, 52, 62, 65, 80, 100, 104, 124, 130, 131, 155, 200, 208, 248, 260, 262, 310, 325, 400, 403, 496, 520, 524, 620, 650, 655, 775, 806, 947, 1040, 1048, 1240, 1300, 1310, 1550, 1612, 1703, 1894, 2015, 2096, 2480, 2600, 2620, 3100, 3224, 3275, 3406, 3788, 4030, 4061, 4735, 5200, 5240, 6200, 6448, 6550, 6812, 7576, 8060, 8122, 8515, 9470, 10075, 10480, 12311, 12400, 13100, 13624, 15152, 16120, 16244, 17030, 18940, 20150, 20305, 23675, 24622, 26200, 27248, 29357, 32240, 32488, 34060, 37880, 40300, 40610, 42575, 47350, 49244, 52400, 52793, 58714, 61555, 64976, 68120, 75760, 80600, 81220, 85150, 94700, 98488, 101525, 105586, 117428, 123110, 124057, 136240, 146785, 161200, 162440, 170300, 189400, 196976, 203050, 211172, 234856, 246220, 248114, 263965, 293570, 307775, 324880, 340600, 378800, 381641, 406100, 422344, 469712, 492440, 496228, 527930, 587140, 615550, 620285, 681200, 733925, 763282, 812200, 844688, 984880, 992456, 1055860, 1174280, 1231100, 1240570, 1319825, 1467850, 1526564, 1612741, 1624400, 1908205, 1984912, 2111720, 2348560, 2462200, 2481140, 2639650, 2935700, 3053128, 3101425, 3225482, 3816410, 3845767, 4223440, 4924400, 4962280, 5279300, 5871400, 6106256, 6202850, 6450964, 7632820, 7691534, 8063705, 9541025, 9924560, 10558600, 11742800, 12405700, 12901928, 15265640, 15383068, 16127410, 19082050, 19228835, 21117200, 24811400, 25803856, 30531280, 30766136, 32254820, 38164100, 38457670, 40318525, 49622800, 49994971, 61532272, 64509640, 76328200, 76915340, 80637050, 96144175, 99989942, 129019280, 152656400, 153830680, 161274100, 192288350, 199979884, 249974855, 307661360, 322548200, 384576700, 399959768, 499949710, 645096400, 769153400, 799919536, 999899420, 1249874275, 1538306800, 1999798840, 2499748550, 3999597680, 4999497100, 9998994200, 19997988400]

約数ペア:

[(1, 19997988400), (2, 9998994200), (4, 4999497100), (5, 3999597680), (8, 2499748550), (10, 1999798840), (13, 1538306800), (16, 1249874275), (20, 999899420), (25, 799919536), (26, 769153400), (31, 645096400), (40, 499949710), (50, 399959768), (52, 384576700), (62, 322548200), (65, 307661360), (80, 249974855), (100, 199979884), (104, 192288350), (124, 161274100), (130, 153830680), (131, 152656400), (155, 129019280), (200, 99989942), (208, 96144175), (248, 80637050), (260, 76915340), (262, 76328200), (310, 64509640), (325, 61532272), (400, 49994971), (403, 49622800), (496, 40318525), (520, 38457670), (524, 38164100), (620, 32254820), (650, 30766136), (655, 30531280), (775, 25803856), (806, 24811400), (947, 21117200), (1040, 19228835), (1048, 19082050), (1240, 16127410), (1300, 15383068), (1310, 15265640), (1550, 12901928), (1612, 12405700), (1703, 11742800), (1894, 10558600), (2015, 9924560), (2096, 9541025), (2480, 8063705), (2600, 7691534), (2620, 7632820), (3100, 6450964), (3224, 6202850), (3275, 6106256), (3406, 5871400), (3788, 5279300), (4030, 4962280), (4061, 4924400), (4735, 4223440), (5200, 3845767), (5240, 3816410), (6200, 3225482), (6448, 3101425), (6550, 3053128), (6812, 2935700), (7576, 2639650), (8060, 2481140), (8122, 2462200), (8515, 2348560), (9470, 2111720), (10075, 1984912), (10480, 1908205), (12311, 1624400), (12400, 1612741), (13100, 1526564), (13624, 1467850), (15152, 1319825), (16120, 1240570), (16244, 1231100), (17030, 1174280), (18940, 1055860), (20150, 992456), (20305, 984880), (23675, 844688), (24622, 812200), (26200, 763282), (27248, 733925), (29357, 681200), (32240, 620285), (32488, 615550), (34060, 587140), (37880, 527930), (40300, 496228), (40610, 492440), (42575, 469712), (47350, 422344), (49244, 406100), (52400, 381641), (52793, 378800), (58714, 340600), (61555, 324880), (64976, 307775), (68120, 293570), (75760, 263965), (80600, 248114), (81220, 246220), (85150, 234856), (94700, 211172), (98488, 203050), (101525, 196976), (105586, 189400), (117428, 170300), (123110, 162440), (124057, 161200), (136240, 146785)]