21509211

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{113}}^1\times {\mathrm{947}}^1$

素因数の和:1130

約数の個数: 16

約数和(自身を含む): 29395584

約数和(自身を除く): 7886373

約数列:

[1, 3, 67, 113, 201, 339, 947, 2841, 7571, 22713, 63449, 107011, 190347, 321033, 7169737, 21509211]

約数ペア:

[(1, 21509211), (3, 7169737), (67, 321033), (113, 190347), (201, 107011), (339, 63449), (947, 22713), (2841, 7571)]