21897575

素因数分解:

$5^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{797}}^1$

素因数の和:971

約数の個数: 24

約数和(自身を含む): 31268832

約数和(自身を除く): 9371257

約数列:

[1, 5, 7, 25, 35, 157, 175, 785, 797, 1099, 3925, 3985, 5495, 5579, 19925, 27475, 27895, 125129, 139475, 625645, 875903, 3128225, 4379515, 21897575]

約数ペア:

[(1, 21897575), (5, 4379515), (7, 3128225), (25, 875903), (35, 625645), (157, 139475), (175, 125129), (785, 27895), (797, 27475), (1099, 19925), (3925, 5579), (3985, 5495)]