21085407080

素因数分解:

$2^3\times 5^1\times {\mathrm{527135177}}^1$

素因数の和:527135188

約数の個数: 16

約数和(自身を含む): 47442166020

約数和(自身を除く): 26356758940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 527135177, 1054270354, 2108540708, 2635675885, 4217081416, 5271351770, 10542703540, 21085407080]

約数ペア:

[(1, 21085407080), (2, 10542703540), (4, 5271351770), (5, 4217081416), (8, 2635675885), (10, 2108540708), (20, 1054270354), (40, 527135177)]