21276915

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128951}}^1$

素因数の和:128970

約数の個数: 16

約数和(自身を含む): 37138176

約数和(自身を除く): 15861261

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128951, 386853, 644755, 1418461, 1934265, 4255383, 7092305, 21276915]

約数ペア:

[(1, 21276915), (3, 7092305), (5, 4255383), (11, 1934265), (15, 1418461), (33, 644755), (55, 386853), (165, 128951)]