20957780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14759}}^1$

素因数の和:14839

約数の個数: 24

約数和(自身を含む): 44634240

約数和(自身を除く): 23676460

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14759, 29518, 59036, 73795, 147590, 295180, 1047889, 2095778, 4191556, 5239445, 10478890, 20957780]

約数ペア:

[(1, 20957780), (2, 10478890), (4, 5239445), (5, 4191556), (10, 2095778), (20, 1047889), (71, 295180), (142, 147590), (284, 73795), (355, 59036), (710, 29518), (1420, 14759)]