21105640

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6679}}^1$

素因数の和:6769

約数の個数: 32

約数和(自身を含む): 48096000

約数和(自身を除く): 26990360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6679, 13358, 26716, 33395, 53432, 66790, 133580, 267160, 527641, 1055282, 2110564, 2638205, 4221128, 5276410, 10552820, 21105640]

約数ペア:

[(1, 21105640), (2, 10552820), (4, 5276410), (5, 4221128), (8, 2638205), (10, 2110564), (20, 1055282), (40, 527641), (79, 267160), (158, 133580), (316, 66790), (395, 53432), (632, 33395), (790, 26716), (1580, 13358), (3160, 6679)]