18771640

素因数分解:

$2^3\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1069}}^1$

素因数の和:1519

約数の個数: 32

約数和(自身を含む): 42372000

約数和(自身を除く): 23600360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 439, 878, 1069, 1756, 2138, 2195, 3512, 4276, 4390, 5345, 8552, 8780, 10690, 17560, 21380, 42760, 469291, 938582, 1877164, 2346455, 3754328, 4692910, 9385820, 18771640]

約数ペア:

[(1, 18771640), (2, 9385820), (4, 4692910), (5, 3754328), (8, 2346455), (10, 1877164), (20, 938582), (40, 469291), (439, 42760), (878, 21380), (1069, 17560), (1756, 10690), (2138, 8780), (2195, 8552), (3512, 5345), (4276, 4390)]