21910225

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{643}}^1$

素因数の和:729

約数の個数: 24

約数和(自身を含む): 28748160

約数和(自身を除く): 6837935

約数列:

[1, 5, 25, 29, 47, 145, 235, 643, 725, 1175, 1363, 3215, 6815, 16075, 18647, 30221, 34075, 93235, 151105, 466175, 755525, 876409, 4382045, 21910225]

約数ペア:

[(1, 21910225), (5, 4382045), (25, 876409), (29, 755525), (47, 466175), (145, 151105), (235, 93235), (643, 34075), (725, 30221), (1175, 18647), (1363, 16075), (3215, 6815)]