21627305

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{643}}^1$

素因数の和:717

約数の個数: 24

約数和(自身を含む): 30695616

約数和(自身を除く): 9068311

約数列:

[1, 5, 7, 31, 35, 155, 217, 643, 961, 1085, 3215, 4501, 4805, 6727, 19933, 22505, 33635, 99665, 139531, 617923, 697655, 3089615, 4325461, 21627305]

約数ペア:

[(1, 21627305), (5, 4325461), (7, 3089615), (31, 697655), (35, 617923), (155, 139531), (217, 99665), (643, 33635), (961, 22505), (1085, 19933), (3215, 6727), (4501, 4805)]