20215665

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{10957}}^1$

素因数の和:11009

約数の個数: 24

約数和(自身を含む): 35898408

約数和(自身を除く): 15682743

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 1845, 10957, 32871, 54785, 98613, 164355, 449237, 493065, 1347711, 2246185, 4043133, 6738555, 20215665]

約数ペア:

[(1, 20215665), (3, 6738555), (5, 4043133), (9, 2246185), (15, 1347711), (41, 493065), (45, 449237), (123, 164355), (205, 98613), (369, 54785), (615, 32871), (1845, 10957)]