21113980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14869}}^1$

素因数の和:14949

約数の個数: 24

約数和(自身を含む): 44966880

約数和(自身を除く): 23852900

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14869, 29738, 59476, 74345, 148690, 297380, 1055699, 2111398, 4222796, 5278495, 10556990, 21113980]

約数ペア:

[(1, 21113980), (2, 10556990), (4, 5278495), (5, 4222796), (10, 2111398), (20, 1055699), (71, 297380), (142, 148690), (284, 74345), (355, 59476), (710, 29738), (1420, 14869)]