128907440

素因数分解:

$2^4\times 5^1\times {\mathrm{1611343}}^1$

素因数の和:1611356

約数の個数: 20

約数和(自身を含む): 299709984

約数和(自身を除く): 170802544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1611343, 3222686, 6445372, 8056715, 12890744, 16113430, 25781488, 32226860, 64453720, 128907440]

約数ペア:

[(1, 128907440), (2, 64453720), (4, 32226860), (5, 25781488), (8, 16113430), (10, 12890744), (16, 8056715), (20, 6445372), (40, 3222686), (80, 1611343)]