20717750

素因数分解:

$2^1\times 5^3\times {\mathrm{79}}^1\times {\mathrm{1049}}^1$

素因数の和:1145

約数の個数: 32

約数和(自身を含む): 39312000

約数和(自身を除く): 18594250

約数列:

[1, 2, 5, 10, 25, 50, 79, 125, 158, 250, 395, 790, 1049, 1975, 2098, 3950, 5245, 9875, 10490, 19750, 26225, 52450, 82871, 131125, 165742, 262250, 414355, 828710, 2071775, 4143550, 10358875, 20717750]

約数ペア:

[(1, 20717750), (2, 10358875), (5, 4143550), (10, 2071775), (25, 828710), (50, 414355), (79, 262250), (125, 165742), (158, 131125), (250, 82871), (395, 52450), (790, 26225), (1049, 19750), (1975, 10490), (2098, 9875), (3950, 5245)]