20990305

素因数分解:

$5^1\times 7^1\times {\mathrm{271}}^1\times {\mathrm{2213}}^1$

素因数の和:2496

約数の個数: 16

約数和(自身を含む): 28905984

約数和(自身を除く): 7915679

約数列:

[1, 5, 7, 35, 271, 1355, 1897, 2213, 9485, 11065, 15491, 77455, 599723, 2998615, 4198061, 20990305]

約数ペア:

[(1, 20990305), (5, 4198061), (7, 2998615), (35, 599723), (271, 77455), (1355, 15491), (1897, 11065), (2213, 9485)]