634640

素因数分解:

$2^4\times 5^1\times {\mathrm{7933}}^1$

素因数の和:7946

約数の個数: 20

約数和(自身を含む): 1475724

約数和(自身を除く): 841084

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 7933, 15866, 31732, 39665, 63464, 79330, 126928, 158660, 317320, 634640]

約数ペア:

[(1, 634640), (2, 317320), (4, 158660), (5, 126928), (8, 79330), (10, 63464), (16, 39665), (20, 31732), (40, 15866), (80, 7933)]