20807745

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11657}}^1$

素因数の和:11689

約数の個数: 32

約数和(自身を含む): 40290048

約数和(自身を除く): 19482303

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11657, 34971, 58285, 81599, 174855, 198169, 244797, 407995, 594507, 990845, 1223985, 1387183, 2972535, 4161549, 6935915, 20807745]

約数ペア:

[(1, 20807745), (3, 6935915), (5, 4161549), (7, 2972535), (15, 1387183), (17, 1223985), (21, 990845), (35, 594507), (51, 407995), (85, 244797), (105, 198169), (119, 174855), (255, 81599), (357, 58285), (595, 34971), (1785, 11657)]