20289400

素因数分解:

$2^3\times 5^2\times {\mathrm{229}}^1\times {\mathrm{443}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 47485800

約数和(自身を除く): 27196400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 229, 443, 458, 886, 916, 1145, 1772, 1832, 2215, 2290, 3544, 4430, 4580, 5725, 8860, 9160, 11075, 11450, 17720, 22150, 22900, 44300, 45800, 88600, 101447, 202894, 405788, 507235, 811576, 1014470, 2028940, 2536175, 4057880, 5072350, 10144700, 20289400]

約数ペア:

[(1, 20289400), (2, 10144700), (4, 5072350), (5, 4057880), (8, 2536175), (10, 2028940), (20, 1014470), (25, 811576), (40, 507235), (50, 405788), (100, 202894), (200, 101447), (229, 88600), (443, 45800), (458, 44300), (886, 22900), (916, 22150), (1145, 17720), (1772, 11450), (1832, 11075), (2215, 9160), (2290, 8860), (3544, 5725), (4430, 4580)]