133520

素因数分解:

$2^4\times 5^1\times {\mathrm{1669}}^1$

素因数の和:1682

約数の個数: 20

約数和(自身を含む): 310620

約数和(自身を除く): 177100

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1669, 3338, 6676, 8345, 13352, 16690, 26704, 33380, 66760, 133520]

約数ペア:

[(1, 133520), (2, 66760), (4, 33380), (5, 26704), (8, 16690), (10, 13352), (16, 8345), (20, 6676), (40, 3338), (80, 1669)]