20746220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{521}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 47882016

約数和(自身を除く): 27135796

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 181, 220, 362, 521, 724, 905, 1042, 1810, 1991, 2084, 2605, 3620, 3982, 5210, 5731, 7964, 9955, 10420, 11462, 19910, 22924, 28655, 39820, 57310, 94301, 114620, 188602, 377204, 471505, 943010, 1037311, 1886020, 2074622, 4149244, 5186555, 10373110, 20746220]

約数ペア:

[(1, 20746220), (2, 10373110), (4, 5186555), (5, 4149244), (10, 2074622), (11, 1886020), (20, 1037311), (22, 943010), (44, 471505), (55, 377204), (110, 188602), (181, 114620), (220, 94301), (362, 57310), (521, 39820), (724, 28655), (905, 22924), (1042, 19910), (1810, 11462), (1991, 10420), (2084, 9955), (2605, 7964), (3620, 5731), (3982, 5210)]