21307910

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2687}}^1$

素因数の和:2768

約数の個数: 32

約数和(自身を含む): 41997312

約数和(自身を除く): 20689402

約数列:

[1, 2, 5, 10, 13, 26, 61, 65, 122, 130, 305, 610, 793, 1586, 2687, 3965, 5374, 7930, 13435, 26870, 34931, 69862, 163907, 174655, 327814, 349310, 819535, 1639070, 2130791, 4261582, 10653955, 21307910]

約数ペア:

[(1, 21307910), (2, 10653955), (5, 4261582), (10, 2130791), (13, 1639070), (26, 819535), (61, 349310), (65, 327814), (122, 174655), (130, 163907), (305, 69862), (610, 34931), (793, 26870), (1586, 13435), (2687, 7930), (3965, 5374)]