19807915

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{2719}}^1$

素因数の和:2802

約数の個数: 16

約数和(自身を含む): 25067520

約数和(自身を除く): 5259605

約数列:

[1, 5, 31, 47, 155, 235, 1457, 2719, 7285, 13595, 84289, 127793, 421445, 638965, 3961583, 19807915]

約数ペア:

[(1, 19807915), (5, 3961583), (31, 638965), (47, 421445), (155, 127793), (235, 84289), (1457, 13595), (2719, 7285)]