19749980

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{3671}}^1$

素因数の和:3949

約数の個数: 24

約数和(自身を含む): 41640480

約数和(自身を除く): 21890500

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 3671, 5380, 7342, 14684, 18355, 36710, 73420, 987499, 1974998, 3949996, 4937495, 9874990, 19749980]

約数ペア:

[(1, 19749980), (2, 9874990), (4, 4937495), (5, 3949996), (10, 1974998), (20, 987499), (269, 73420), (538, 36710), (1076, 18355), (1345, 14684), (2690, 7342), (3671, 5380)]