12989560

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2557}}^1$

素因数の和:2695

約数の個数: 32

約数和(自身を含む): 29468160

約数和(自身を除く): 16478600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 2557, 5080, 5114, 10228, 12785, 20456, 25570, 51140, 102280, 324739, 649478, 1298956, 1623695, 2597912, 3247390, 6494780, 12989560]

約数ペア:

[(1, 12989560), (2, 6494780), (4, 3247390), (5, 2597912), (8, 1623695), (10, 1298956), (20, 649478), (40, 324739), (127, 102280), (254, 51140), (508, 25570), (635, 20456), (1016, 12785), (1270, 10228), (2540, 5114), (2557, 5080)]