21086890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191699}}^1$

素因数の和:191717

約数の個数: 16

約数和(自身を含む): 41407200

約数和(自身を除く): 20320310

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 191699, 383398, 958495, 1916990, 2108689, 4217378, 10543445, 21086890]

約数ペア:

[(1, 21086890), (2, 10543445), (5, 4217378), (10, 2108689), (11, 1916990), (22, 958495), (55, 383398), (110, 191699)]