128860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{379}}^1$

素因数の和:405

約数の個数: 24

約数和(自身を含む): 287280

約数和(自身を除く): 158420

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 379, 758, 1516, 1895, 3790, 6443, 7580, 12886, 25772, 32215, 64430, 128860]

約数ペア:

[(1, 128860), (2, 64430), (4, 32215), (5, 25772), (10, 12886), (17, 7580), (20, 6443), (34, 3790), (68, 1895), (85, 1516), (170, 758), (340, 379)]