19857025

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{449}}^1$

素因数の和:549

約数の個数: 24

約数和(自身を含む): 25947000

約数和(自身を除く): 6089975

約数列:

[1, 5, 25, 29, 61, 145, 305, 449, 725, 1525, 1769, 2245, 8845, 11225, 13021, 27389, 44225, 65105, 136945, 325525, 684725, 794281, 3971405, 19857025]

約数ペア:

[(1, 19857025), (5, 3971405), (25, 794281), (29, 684725), (61, 325525), (145, 136945), (305, 65105), (449, 44225), (725, 27389), (1525, 13021), (1769, 11225), (2245, 8845)]