20217550

素因数分解:

$2^1\times 5^2\times {\mathrm{139}}^1\times {\mathrm{2909}}^1$

素因数の和:3060

約数の個数: 24

約数和(自身を含む): 37888200

約数和(自身を除く): 17670650

約数列:

[1, 2, 5, 10, 25, 50, 139, 278, 695, 1390, 2909, 3475, 5818, 6950, 14545, 29090, 72725, 145450, 404351, 808702, 2021755, 4043510, 10108775, 20217550]

約数ペア:

[(1, 20217550), (2, 10108775), (5, 4043510), (10, 2021755), (25, 808702), (50, 404351), (139, 145450), (278, 72725), (695, 29090), (1390, 14545), (2909, 6950), (3475, 5818)]