21221079

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{709}}^1\times {\mathrm{907}}^1$

素因数の和:1630

約数の個数: 16

約数和(自身を含む): 30944640

約数和(自身を除く): 9723561

約数列:

[1, 3, 11, 33, 709, 907, 2127, 2721, 7799, 9977, 23397, 29931, 643063, 1929189, 7073693, 21221079]

約数ペア:

[(1, 21221079), (3, 7073693), (11, 1929189), (33, 643063), (709, 29931), (907, 23397), (2127, 9977), (2721, 7799)]