21417640

素因数分解:

$2^3\times 5^1\times {\mathrm{277}}^1\times {\mathrm{1933}}^1$

素因数の和:2221

約数の個数: 32

約数和(自身を含む): 48388680

約数和(自身を除く): 26971040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 277, 554, 1108, 1385, 1933, 2216, 2770, 3866, 5540, 7732, 9665, 11080, 15464, 19330, 38660, 77320, 535441, 1070882, 2141764, 2677205, 4283528, 5354410, 10708820, 21417640]

約数ペア:

[(1, 21417640), (2, 10708820), (4, 5354410), (5, 4283528), (8, 2677205), (10, 2141764), (20, 1070882), (40, 535441), (277, 77320), (554, 38660), (1108, 19330), (1385, 15464), (1933, 11080), (2216, 9665), (2770, 7732), (3866, 5540)]