20520745

素因数分解:

$5^1\times 7^1\times {\mathrm{661}}^1\times {\mathrm{887}}^1$

素因数の和:1560

約数の個数: 16

約数和(自身を含む): 28217088

約数和(自身を除く): 7696343

約数列:

[1, 5, 7, 35, 661, 887, 3305, 4435, 4627, 6209, 23135, 31045, 586307, 2931535, 4104149, 20520745]

約数ペア:

[(1, 20520745), (5, 4104149), (7, 2931535), (35, 586307), (661, 31045), (887, 23135), (3305, 6209), (4435, 4627)]