20866865

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{421}}^1\times {\mathrm{431}}^1$

素因数の和:880

約数の個数: 16

約数和(自身を含む): 26251776

約数和(自身を除く): 5384911

約数列:

[1, 5, 23, 115, 421, 431, 2105, 2155, 9683, 9913, 48415, 49565, 181451, 907255, 4173373, 20866865]

約数ペア:

[(1, 20866865), (5, 4173373), (23, 907255), (115, 181451), (421, 49565), (431, 48415), (2105, 9913), (2155, 9683)]