638860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1879}}^1$

素因数の和:1905

約数の個数: 24

約数和(自身を含む): 1421280

約数和(自身を除く): 782420

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 1879, 3758, 7516, 9395, 18790, 31943, 37580, 63886, 127772, 159715, 319430, 638860]

約数ペア:

[(1, 638860), (2, 319430), (4, 159715), (5, 127772), (10, 63886), (17, 37580), (20, 31943), (34, 18790), (68, 9395), (85, 7516), (170, 3758), (340, 1879)]