128477680

素因数分解:

$2^4\times 5^1\times {\mathrm{1605971}}^1$

素因数の和:1605984

約数の個数: 20

約数和(自身を含む): 298710792

約数和(自身を除く): 170233112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1605971, 3211942, 6423884, 8029855, 12847768, 16059710, 25695536, 32119420, 64238840, 128477680]

約数ペア:

[(1, 128477680), (2, 64238840), (4, 32119420), (5, 25695536), (8, 16059710), (10, 12847768), (16, 8029855), (20, 6423884), (40, 3211942), (80, 1605971)]