20289425

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{383}}^1$

素因数の和:569

約数の個数: 24

約数和(自身を含む): 27331584

約数和(自身を除く): 7042159

約数列:

[1, 5, 13, 25, 65, 163, 325, 383, 815, 1915, 2119, 4075, 4979, 9575, 10595, 24895, 52975, 62429, 124475, 312145, 811577, 1560725, 4057885, 20289425]

約数ペア:

[(1, 20289425), (5, 4057885), (13, 1560725), (25, 811577), (65, 312145), (163, 124475), (325, 62429), (383, 52975), (815, 24895), (1915, 10595), (2119, 9575), (4075, 4979)]