20395720

素因数分解:

$2^3\times 5^1\times {\mathrm{443}}^1\times {\mathrm{1151}}^1$

素因数の和:1605

約数の個数: 32

約数和(自身を含む): 46033920

約数和(自身を除く): 25638200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 443, 886, 1151, 1772, 2215, 2302, 3544, 4430, 4604, 5755, 8860, 9208, 11510, 17720, 23020, 46040, 509893, 1019786, 2039572, 2549465, 4079144, 5098930, 10197860, 20395720]

約数ペア:

[(1, 20395720), (2, 10197860), (4, 5098930), (5, 4079144), (8, 2549465), (10, 2039572), (20, 1019786), (40, 509893), (443, 46040), (886, 23020), (1151, 17720), (1772, 11510), (2215, 9208), (2302, 8860), (3544, 5755), (4430, 4604)]