20661905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{7993}}^1$

素因数の和:8056

約数の個数: 16

約数和(自身を含む): 27627264

約数和(自身を除く): 6965359

約数列:

[1, 5, 11, 47, 55, 235, 517, 2585, 7993, 39965, 87923, 375671, 439615, 1878355, 4132381, 20661905]

約数ペア:

[(1, 20661905), (5, 4132381), (11, 1878355), (47, 439615), (55, 375671), (235, 87923), (517, 39965), (2585, 7993)]