20287960

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{941}}^1$

素因数の和:977

約数の個数: 96

約数和(自身を含む): 57989520

約数和(自身を除く): 37701560

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 88, 98, 110, 140, 154, 196, 220, 245, 280, 308, 385, 392, 440, 490, 539, 616, 770, 941, 980, 1078, 1540, 1882, 1960, 2156, 2695, 3080, 3764, 4312, 4705, 5390, 6587, 7528, 9410, 10351, 10780, 13174, 18820, 20702, 21560, 26348, 32935, 37640, 41404, 46109, 51755, 52696, 65870, 72457, 82808, 92218, 103510, 131740, 144914, 184436, 207020, 230545, 263480, 289828, 362285, 368872, 414040, 461090, 507199, 579656, 724570, 922180, 1014398, 1449140, 1844360, 2028796, 2535995, 2898280, 4057592, 5071990, 10143980, 20287960]

約数ペア:

[(1, 20287960), (2, 10143980), (4, 5071990), (5, 4057592), (7, 2898280), (8, 2535995), (10, 2028796), (11, 1844360), (14, 1449140), (20, 1014398), (22, 922180), (28, 724570), (35, 579656), (40, 507199), (44, 461090), (49, 414040), (55, 368872), (56, 362285), (70, 289828), (77, 263480), (88, 230545), (98, 207020), (110, 184436), (140, 144914), (154, 131740), (196, 103510), (220, 92218), (245, 82808), (280, 72457), (308, 65870), (385, 52696), (392, 51755), (440, 46109), (490, 41404), (539, 37640), (616, 32935), (770, 26348), (941, 21560), (980, 20702), (1078, 18820), (1540, 13174), (1882, 10780), (1960, 10351), (2156, 9410), (2695, 7528), (3080, 6587), (3764, 5390), (4312, 4705)]