655121680

素因数分解:

$2^4\times 5^1\times {\mathrm{8189021}}^1$

素因数の和:8189034

約数の個数: 20

約数和(自身を含む): 1523158092

約数和(自身を除く): 868036412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8189021, 16378042, 32756084, 40945105, 65512168, 81890210, 131024336, 163780420, 327560840, 655121680]

約数ペア:

[(1, 655121680), (2, 327560840), (4, 163780420), (5, 131024336), (8, 81890210), (10, 65512168), (16, 40945105), (20, 32756084), (40, 16378042), (80, 8189021)]