18977185

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{571}}^1$

素因数の和:633

約数の個数: 24

約数和(自身を含む): 25286976

約数和(自身を除く): 6309791

約数列:

[1, 5, 17, 23, 85, 115, 289, 391, 571, 1445, 1955, 2855, 6647, 9707, 13133, 33235, 48535, 65665, 165019, 223261, 825095, 1116305, 3795437, 18977185]

約数ペア:

[(1, 18977185), (5, 3795437), (17, 1116305), (23, 825095), (85, 223261), (115, 165019), (289, 65665), (391, 48535), (571, 33235), (1445, 13133), (1955, 9707), (2855, 6647)]