21494440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4441}}^1$

素因数の和:4474

約数の個数: 48

約数和(自身を含む): 53170740

約数和(自身を除く): 31676300

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4441, 4840, 8882, 17764, 22205, 35528, 44410, 48851, 88820, 97702, 177640, 195404, 244255, 390808, 488510, 537361, 977020, 1074722, 1954040, 2149444, 2686805, 4298888, 5373610, 10747220, 21494440]

約数ペア:

[(1, 21494440), (2, 10747220), (4, 5373610), (5, 4298888), (8, 2686805), (10, 2149444), (11, 1954040), (20, 1074722), (22, 977020), (40, 537361), (44, 488510), (55, 390808), (88, 244255), (110, 195404), (121, 177640), (220, 97702), (242, 88820), (440, 48851), (484, 44410), (605, 35528), (968, 22205), (1210, 17764), (2420, 8882), (4441, 4840)]