664437580

素因数分解:

$2^2\times 5^1\times {\mathrm{33221879}}^1$

素因数の和:33221888

約数の個数: 12

約数和(自身を含む): 1395318960

約数和(自身を除く): 730881380

約数列:

[1, 2, 4, 5, 10, 20, 33221879, 66443758, 132887516, 166109395, 332218790, 664437580]

約数ペア:

[(1, 664437580), (2, 332218790), (4, 166109395), (5, 132887516), (10, 66443758), (20, 33221879)]