21222399

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{27961}}^1$

素因数の和:27998

約数の個数: 16

約数和(自身を含む): 32212224

約数和(自身を除く): 10989825

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 27961, 83883, 307571, 643103, 922713, 1929309, 7074133, 21222399]

約数ペア:

[(1, 21222399), (3, 7074133), (11, 1929309), (23, 922713), (33, 643103), (69, 307571), (253, 83883), (759, 27961)]