21985223281

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{211}}^1\times {\mathrm{251}}^1\times {\mathrm{1913}}^1$

素因数の和:2413

約数の個数: 32

約数和(自身を含む): 26176905216

約数和(自身を除く): 4191681935

約数列:

[1, 7, 31, 211, 217, 251, 1477, 1757, 1913, 6541, 7781, 13391, 45787, 52961, 54467, 59303, 370727, 403643, 415121, 480163, 1641791, 2825501, 3361141, 11492537, 12512933, 14885053, 87590531, 101314393, 104195371, 709200751, 3140746183, 21985223281]

約数ペア:

[(1, 21985223281), (7, 3140746183), (31, 709200751), (211, 104195371), (217, 101314393), (251, 87590531), (1477, 14885053), (1757, 12512933), (1913, 11492537), (6541, 3361141), (7781, 2825501), (13391, 1641791), (45787, 480163), (52961, 415121), (54467, 403643), (59303, 370727)]