20208175

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{4783}}^1$

素因数の和:4819

約数の個数: 18

約数和(自身を含む): 27139632

約数和(自身を除く): 6931457

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 4783, 23915, 62179, 119575, 310895, 808327, 1554475, 4041635, 20208175]

約数ペア:

[(1, 20208175), (5, 4041635), (13, 1554475), (25, 808327), (65, 310895), (169, 119575), (325, 62179), (845, 23915), (4225, 4783)]