20515915

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{30851}}^1$

素因数の和:30882

約数の個数: 16

約数和(自身を含む): 29617920

約数和(自身を除く): 9102005

約数列:

[1, 5, 7, 19, 35, 95, 133, 665, 30851, 154255, 215957, 586169, 1079785, 2930845, 4103183, 20515915]

約数ペア:

[(1, 20515915), (5, 4103183), (7, 2930845), (19, 1079785), (35, 586169), (95, 215957), (133, 154255), (665, 30851)]