20099600

素因数分解:

$2^4\times 5^2\times {\mathrm{109}}^1\times {\mathrm{461}}^1$

素因数の和:588

約数の個数: 60

約数和(自身を含む): 48838020

約数和(自身を除く): 28738420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 109, 200, 218, 400, 436, 461, 545, 872, 922, 1090, 1744, 1844, 2180, 2305, 2725, 3688, 4360, 4610, 5450, 7376, 8720, 9220, 10900, 11525, 18440, 21800, 23050, 36880, 43600, 46100, 50249, 92200, 100498, 184400, 200996, 251245, 401992, 502490, 803984, 1004980, 1256225, 2009960, 2512450, 4019920, 5024900, 10049800, 20099600]

約数ペア:

[(1, 20099600), (2, 10049800), (4, 5024900), (5, 4019920), (8, 2512450), (10, 2009960), (16, 1256225), (20, 1004980), (25, 803984), (40, 502490), (50, 401992), (80, 251245), (100, 200996), (109, 184400), (200, 100498), (218, 92200), (400, 50249), (436, 46100), (461, 43600), (545, 36880), (872, 23050), (922, 21800), (1090, 18440), (1744, 11525), (1844, 10900), (2180, 9220), (2305, 8720), (2725, 7376), (3688, 5450), (4360, 4610)]