21704860

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{2083}}^1$

素因数の和:2613

約数の個数: 24

約数和(自身を含む): 45689616

約数和(自身を除く): 23984756

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 2083, 2084, 2605, 4166, 5210, 8332, 10415, 10420, 20830, 41660, 1085243, 2170486, 4340972, 5426215, 10852430, 21704860]

約数ペア:

[(1, 21704860), (2, 10852430), (4, 5426215), (5, 4340972), (10, 2170486), (20, 1085243), (521, 41660), (1042, 20830), (2083, 10420), (2084, 10415), (2605, 8332), (4166, 5210)]