21321404

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{521}}^1\times {\mathrm{787}}^1$

素因数の和:1325

約数の個数: 24

約数和(自身を含む): 40310928

約数和(自身を除く): 18989524

約数列:

[1, 2, 4, 13, 26, 52, 521, 787, 1042, 1574, 2084, 3148, 6773, 10231, 13546, 20462, 27092, 40924, 410027, 820054, 1640108, 5330351, 10660702, 21321404]

約数ペア:

[(1, 21321404), (2, 10660702), (4, 5330351), (13, 1640108), (26, 820054), (52, 410027), (521, 40924), (787, 27092), (1042, 20462), (1574, 13546), (2084, 10231), (3148, 6773)]