20456140

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{3889}}^1$

素因数の和:4161

約数の個数: 24

約数和(自身を含む): 43132320

約数和(自身を除く): 22676180

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 3889, 5260, 7778, 15556, 19445, 38890, 77780, 1022807, 2045614, 4091228, 5114035, 10228070, 20456140]

約数ペア:

[(1, 20456140), (2, 10228070), (4, 5114035), (5, 4091228), (10, 2045614), (20, 1022807), (263, 77780), (526, 38890), (1052, 19445), (1315, 15556), (2630, 7778), (3889, 5260)]