21117200

素因数分解:

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

素因数の和:193

約数の個数: 120

約数和(自身を含む): 56829696

約数和(自身を除く): 35712496

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, 1040, 1048, 1240, 1300, 1310, 1550, 1612, 1703, 2015, 2096, 2480, 2600, 2620, 3100, 3224, 3275, 3406, 4030, 4061, 5200, 5240, 6200, 6448, 6550, 6812, 8060, 8122, 8515, 10075, 10480, 12400, 13100, 13624, 16120, 16244, 17030, 20150, 20305, 26200, 27248, 32240, 32488, 34060, 40300, 40610, 42575, 52400, 52793, 64976, 68120, 80600, 81220, 85150, 101525, 105586, 136240, 161200, 162440, 170300, 203050, 211172, 263965, 324880, 340600, 406100, 422344, 527930, 681200, 812200, 844688, 1055860, 1319825, 1624400, 2111720, 2639650, 4223440, 5279300, 10558600, 21117200]

約数ペア:

[(1, 21117200), (2, 10558600), (4, 5279300), (5, 4223440), (8, 2639650), (10, 2111720), (13, 1624400), (16, 1319825), (20, 1055860), (25, 844688), (26, 812200), (31, 681200), (40, 527930), (50, 422344), (52, 406100), (62, 340600), (65, 324880), (80, 263965), (100, 211172), (104, 203050), (124, 170300), (130, 162440), (131, 161200), (155, 136240), (200, 105586), (208, 101525), (248, 85150), (260, 81220), (262, 80600), (310, 68120), (325, 64976), (400, 52793), (403, 52400), (496, 42575), (520, 40610), (524, 40300), (620, 34060), (650, 32488), (655, 32240), (775, 27248), (806, 26200), (1040, 20305), (1048, 20150), (1240, 17030), (1300, 16244), (1310, 16120), (1550, 13624), (1612, 13100), (1703, 12400), (2015, 10480), (2096, 10075), (2480, 8515), (2600, 8122), (2620, 8060), (3100, 6812), (3224, 6550), (3275, 6448), (3406, 6200), (4030, 5240), (4061, 5200)]