21790820

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{13127}}^1$

素因数の和:13219

約数の個数: 24

約数和(自身を含む): 46315584

約数和(自身を除く): 24524764

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 13127, 26254, 52508, 65635, 131270, 262540, 1089541, 2179082, 4358164, 5447705, 10895410, 21790820]

約数ペア:

[(1, 21790820), (2, 10895410), (4, 5447705), (5, 4358164), (10, 2179082), (20, 1089541), (83, 262540), (166, 131270), (332, 65635), (415, 52508), (830, 26254), (1660, 13127)]