21231565

素因数分解:

$5^1\times {\mathrm{109}}^1\times {\mathrm{163}}^1\times {\mathrm{239}}^1$

素因数の和:516

約数の個数: 16

約数和(自身を含む): 25977600

約数和(自身を除く): 4746035

約数列:

[1, 5, 109, 163, 239, 545, 815, 1195, 17767, 26051, 38957, 88835, 130255, 194785, 4246313, 21231565]

約数ペア:

[(1, 21231565), (5, 4246313), (109, 194785), (163, 130255), (239, 88835), (545, 38957), (815, 26051), (1195, 17767)]