9901420

素因数分解:

$2^2\times 5^1\times {\mathrm{495071}}^1$

素因数の和:495080

約数の個数: 12

約数和(自身を含む): 20793024

約数和(自身を除く): 10891604

約数列:

[1, 2, 4, 5, 10, 20, 495071, 990142, 1980284, 2475355, 4950710, 9901420]

約数ペア:

[(1, 9901420), (2, 4950710), (4, 2475355), (5, 1980284), (10, 990142), (20, 495071)]