21994040

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13411}}^1$

素因数の和:13463

約数の個数: 32

約数和(自身を含む): 50697360

約数和(自身を除く): 28703320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13411, 26822, 53644, 67055, 107288, 134110, 268220, 536440, 549851, 1099702, 2199404, 2749255, 4398808, 5498510, 10997020, 21994040]

約数ペア:

[(1, 21994040), (2, 10997020), (4, 5498510), (5, 4398808), (8, 2749255), (10, 2199404), (20, 1099702), (40, 549851), (41, 536440), (82, 268220), (164, 134110), (205, 107288), (328, 67055), (410, 53644), (820, 26822), (1640, 13411)]