21000000620

素因数分解:

$2^2\times 5^1\times {\mathrm{1050000031}}^1$

素因数の和:1050000040

約数の個数: 12

約数和(自身を含む): 44100001344

約数和(自身を除く): 23100000724

約数列:

[1, 2, 4, 5, 10, 20, 1050000031, 2100000062, 4200000124, 5250000155, 10500000310, 21000000620]

約数ペア:

[(1, 21000000620), (2, 10500000310), (4, 5250000155), (5, 4200000124), (10, 2100000062), (20, 1050000031)]