8720420

素因数分解:

$2^2\times 5^1\times {\mathrm{631}}^1\times {\mathrm{691}}^1$

素因数の和:1331

約数の個数: 24

約数和(自身を含む): 18368448

約数和(自身を除く): 9648028

約数列:

[1, 2, 4, 5, 10, 20, 631, 691, 1262, 1382, 2524, 2764, 3155, 3455, 6310, 6910, 12620, 13820, 436021, 872042, 1744084, 2180105, 4360210, 8720420]

約数ペア:

[(1, 8720420), (2, 4360210), (4, 2180105), (5, 1744084), (10, 872042), (20, 436021), (631, 13820), (691, 12620), (1262, 6910), (1382, 6310), (2524, 3455), (2764, 3155)]