21111640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47981}}^1$

素因数の和:48003

約数の個数: 32

約数和(自身を含む): 51820560

約数和(自身を除く): 30708920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47981, 95962, 191924, 239905, 383848, 479810, 527791, 959620, 1055582, 1919240, 2111164, 2638955, 4222328, 5277910, 10555820, 21111640]

約数ペア:

[(1, 21111640), (2, 10555820), (4, 5277910), (5, 4222328), (8, 2638955), (10, 2111164), (11, 1919240), (20, 1055582), (22, 959620), (40, 527791), (44, 479810), (55, 383848), (88, 239905), (110, 191924), (220, 95962), (440, 47981)]