21972681

素因数分解:

$3^3\times {\mathrm{103}}^1\times {\mathrm{7901}}^1$

素因数の和:8013

約数の個数: 16

約数和(自身を含む): 32872320

約数和(自身を除く): 10899639

約数列:

[1, 3, 9, 27, 103, 309, 927, 2781, 7901, 23703, 71109, 213327, 813803, 2441409, 7324227, 21972681]

約数ペア:

[(1, 21972681), (3, 7324227), (9, 2441409), (27, 813803), (103, 213327), (309, 71109), (927, 23703), (2781, 7901)]