20354990

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{28669}}^1$

素因数の和:28747

約数の個数: 16

約数和(自身を含む): 37156320

約数和(自身を除く): 16801330

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 28669, 57338, 143345, 286690, 2035499, 4070998, 10177495, 20354990]

約数ペア:

[(1, 20354990), (2, 10177495), (5, 4070998), (10, 2035499), (71, 286690), (142, 143345), (355, 57338), (710, 28669)]