128487940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{917771}}^1$

素因数の和:917787

約数の個数: 24

約数和(自身を含む): 308371392

約数和(自身を除く): 179883452

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 917771, 1835542, 3671084, 4588855, 6424397, 9177710, 12848794, 18355420, 25697588, 32121985, 64243970, 128487940]

約数ペア:

[(1, 128487940), (2, 64243970), (4, 32121985), (5, 25697588), (7, 18355420), (10, 12848794), (14, 9177710), (20, 6424397), (28, 4588855), (35, 3671084), (70, 1835542), (140, 917771)]