28012840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:131

約数の個数: 128

約数和(自身を含む): 72576000

約数和(自身を除く): 44563160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 29, 31, 38, 40, 41, 58, 62, 76, 82, 95, 116, 124, 145, 152, 155, 164, 190, 205, 232, 248, 290, 310, 328, 380, 410, 551, 580, 589, 620, 760, 779, 820, 899, 1102, 1160, 1178, 1189, 1240, 1271, 1558, 1640, 1798, 2204, 2356, 2378, 2542, 2755, 2945, 3116, 3596, 3895, 4408, 4495, 4712, 4756, 5084, 5510, 5890, 5945, 6232, 6355, 7192, 7790, 8990, 9512, 10168, 11020, 11780, 11890, 12710, 15580, 17081, 17980, 22040, 22591, 23560, 23780, 24149, 25420, 31160, 34162, 35960, 36859, 45182, 47560, 48298, 50840, 68324, 73718, 85405, 90364, 96596, 112955, 120745, 136648, 147436, 170810, 180728, 184295, 193192, 225910, 241490, 294872, 341620, 368590, 451820, 482980, 683240, 700321, 737180, 903640, 965960, 1400642, 1474360, 2801284, 3501605, 5602568, 7003210, 14006420, 28012840]

約数ペア:

[(1, 28012840), (2, 14006420), (4, 7003210), (5, 5602568), (8, 3501605), (10, 2801284), (19, 1474360), (20, 1400642), (29, 965960), (31, 903640), (38, 737180), (40, 700321), (41, 683240), (58, 482980), (62, 451820), (76, 368590), (82, 341620), (95, 294872), (116, 241490), (124, 225910), (145, 193192), (152, 184295), (155, 180728), (164, 170810), (190, 147436), (205, 136648), (232, 120745), (248, 112955), (290, 96596), (310, 90364), (328, 85405), (380, 73718), (410, 68324), (551, 50840), (580, 48298), (589, 47560), (620, 45182), (760, 36859), (779, 35960), (820, 34162), (899, 31160), (1102, 25420), (1160, 24149), (1178, 23780), (1189, 23560), (1240, 22591), (1271, 22040), (1558, 17980), (1640, 17081), (1798, 15580), (2204, 12710), (2356, 11890), (2378, 11780), (2542, 11020), (2755, 10168), (2945, 9512), (3116, 8990), (3596, 7790), (3895, 7192), (4408, 6355), (4495, 6232), (4712, 5945), (4756, 5890), (5084, 5510)]