20955740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80599}}^1$

素因数の和:80621

約数の個数: 24

約数和(自身を含む): 47392800

約数和(自身を除く): 26437060

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80599, 161198, 322396, 402995, 805990, 1047787, 1611980, 2095574, 4191148, 5238935, 10477870, 20955740]

約数ペア:

[(1, 20955740), (2, 10477870), (4, 5238935), (5, 4191148), (10, 2095574), (13, 1611980), (20, 1047787), (26, 805990), (52, 402995), (65, 322396), (130, 161198), (260, 80599)]