18987215

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{17183}}^1$

素因数の和:17218

約数の個数: 16

約数和(自身を含む): 25982208

約数和(自身を除く): 6994993

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 17183, 85915, 223379, 292111, 1116895, 1460555, 3797443, 18987215]

約数ペア:

[(1, 18987215), (5, 3797443), (13, 1460555), (17, 1116895), (65, 292111), (85, 223379), (221, 85915), (1105, 17183)]