172870420

素因数分解:

$2^2\times 5^1\times {\mathrm{8643521}}^1$

素因数の和:8643530

約数の個数: 12

約数和(自身を含む): 363027924

約数和(自身を除く): 190157504

約数列:

[1, 2, 4, 5, 10, 20, 8643521, 17287042, 34574084, 43217605, 86435210, 172870420]

約数ペア:

[(1, 172870420), (2, 86435210), (4, 43217605), (5, 34574084), (10, 17287042), (20, 8643521)]