21257995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{6551}}^1$

素因数の和:6626

約数の個数: 16

約数和(自身を含む): 28304640

約数和(自身を除く): 7046645

約数列:

[1, 5, 11, 55, 59, 295, 649, 3245, 6551, 32755, 72061, 360305, 386509, 1932545, 4251599, 21257995]

約数ペア:

[(1, 21257995), (5, 4251599), (11, 1932545), (55, 386509), (59, 360305), (295, 72061), (649, 32755), (3245, 6551)]