21816951

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{7879}}^1$

素因数の和:7966

約数の個数: 16

約数和(自身を含む): 31772160

約数和(自身を除く): 9955209

約数列:

[1, 3, 13, 39, 71, 213, 923, 2769, 7879, 23637, 102427, 307281, 559409, 1678227, 7272317, 21816951]

約数ペア:

[(1, 21816951), (3, 7272317), (13, 1678227), (39, 559409), (71, 307281), (213, 102427), (923, 23637), (2769, 7879)]