21984820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7687}}^1$

素因数の和:7720

約数の個数: 48

約数和(自身を含む): 54246528

約数和(自身を除く): 32261708

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7687, 15374, 30748, 38435, 76870, 84557, 99931, 153740, 169114, 199862, 338228, 399724, 422785, 499655, 845570, 999310, 1099241, 1691140, 1998620, 2198482, 4396964, 5496205, 10992410, 21984820]

約数ペア:

[(1, 21984820), (2, 10992410), (4, 5496205), (5, 4396964), (10, 2198482), (11, 1998620), (13, 1691140), (20, 1099241), (22, 999310), (26, 845570), (44, 499655), (52, 422785), (55, 399724), (65, 338228), (110, 199862), (130, 169114), (143, 153740), (220, 99931), (260, 84557), (286, 76870), (572, 38435), (715, 30748), (1430, 15374), (2860, 7687)]