18804519980

素因数分解:

$2^2\times 5^1\times {\mathrm{940225999}}^1$

素因数の和:940226008

約数の個数: 12

約数和(自身を含む): 39489492000

約数和(自身を除く): 20684972020

約数列:

[1, 2, 4, 5, 10, 20, 940225999, 1880451998, 3760903996, 4701129995, 9402259990, 18804519980]

約数ペア:

[(1, 18804519980), (2, 9402259990), (4, 4701129995), (5, 3760903996), (10, 1880451998), (20, 940225999)]