128553680

素因数分解:

$2^4\times 5^1\times {\mathrm{1606921}}^1$

素因数の和:1606934

約数の個数: 20

約数和(自身を含む): 298887492

約数和(自身を除く): 170333812

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1606921, 3213842, 6427684, 8034605, 12855368, 16069210, 25710736, 32138420, 64276840, 128553680]

約数ペア:

[(1, 128553680), (2, 64276840), (4, 32138420), (5, 25710736), (8, 16069210), (10, 12855368), (16, 8034605), (20, 6427684), (40, 3213842), (80, 1606921)]