131412880

素因数分解:

$2^4\times 5^1\times {\mathrm{1642661}}^1$

素因数の和:1642674

約数の個数: 20

約数和(自身を含む): 305535132

約数和(自身を除く): 174122252

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1642661, 3285322, 6570644, 8213305, 13141288, 16426610, 26282576, 32853220, 65706440, 131412880]

約数ペア:

[(1, 131412880), (2, 65706440), (4, 32853220), (5, 26282576), (8, 16426610), (10, 13141288), (16, 8213305), (20, 6570644), (40, 3285322), (80, 1642661)]