20579800

素因数分解:

$2^3\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2393}}^1$

素因数の和:2452

約数の個数: 48

約数和(自身を含む): 48981240

約数和(自身を除く): 28401440

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 43, 50, 86, 100, 172, 200, 215, 344, 430, 860, 1075, 1720, 2150, 2393, 4300, 4786, 8600, 9572, 11965, 19144, 23930, 47860, 59825, 95720, 102899, 119650, 205798, 239300, 411596, 478600, 514495, 823192, 1028990, 2057980, 2572475, 4115960, 5144950, 10289900, 20579800]

約数ペア:

[(1, 20579800), (2, 10289900), (4, 5144950), (5, 4115960), (8, 2572475), (10, 2057980), (20, 1028990), (25, 823192), (40, 514495), (43, 478600), (50, 411596), (86, 239300), (100, 205798), (172, 119650), (200, 102899), (215, 95720), (344, 59825), (430, 47860), (860, 23930), (1075, 19144), (1720, 11965), (2150, 9572), (2393, 8600), (4300, 4786)]