21515277

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53923}}^1$

素因数の和:53952

約数の個数: 16

約数和(自身を含む): 34511360

約数和(自身を除く): 12996083

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53923, 161769, 377461, 1024537, 1132383, 3073611, 7171759, 21515277]

約数ペア:

[(1, 21515277), (3, 7171759), (7, 3073611), (19, 1132383), (21, 1024537), (57, 377461), (133, 161769), (399, 53923)]