21105575

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{241}}^1$

素因数の和:395

約数の個数: 24

約数和(自身を含む): 27367296

約数和(自身を除く): 6261721

約数列:

[1, 5, 25, 31, 113, 155, 241, 565, 775, 1205, 2825, 3503, 6025, 7471, 17515, 27233, 37355, 87575, 136165, 186775, 680825, 844223, 4221115, 21105575]

約数ペア:

[(1, 21105575), (5, 4221115), (25, 844223), (31, 680825), (113, 186775), (155, 136165), (241, 87575), (565, 37355), (775, 27233), (1205, 17515), (2825, 7471), (3503, 6025)]