20404975

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{233}}^1$

素因数の和:387

約数の個数: 24

約数和(自身を含む): 26462592

約数和(自身を除く): 6057617

約数列:

[1, 5, 25, 31, 113, 155, 233, 565, 775, 1165, 2825, 3503, 5825, 7223, 17515, 26329, 36115, 87575, 131645, 180575, 658225, 816199, 4080995, 20404975]

約数ペア:

[(1, 20404975), (5, 4080995), (25, 816199), (31, 658225), (113, 180575), (155, 131645), (233, 87575), (565, 36115), (775, 26329), (1165, 17515), (2825, 7223), (3503, 5825)]