21779875

素因数分解:

$5^3\times {\mathrm{13}}^2\times {\mathrm{1031}}^1$

素因数の和:1072

約数の個数: 24

約数和(自身を含む): 29461536

約数和(自身を除く): 7681661

約数列:

[1, 5, 13, 25, 65, 125, 169, 325, 845, 1031, 1625, 4225, 5155, 13403, 21125, 25775, 67015, 128875, 174239, 335075, 871195, 1675375, 4355975, 21779875]

約数ペア:

[(1, 21779875), (5, 4355975), (13, 1675375), (25, 871195), (65, 335075), (125, 174239), (169, 128875), (325, 67015), (845, 25775), (1031, 21125), (1625, 13403), (4225, 5155)]