20101880

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2551}}^1$

素因数の和:2759

約数の個数: 32

約数和(自身を含む): 45476640

約数和(自身を除く): 25374760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2551, 3940, 5102, 7880, 10204, 12755, 20408, 25510, 51020, 102040, 502547, 1005094, 2010188, 2512735, 4020376, 5025470, 10050940, 20101880]

約数ペア:

[(1, 20101880), (2, 10050940), (4, 5025470), (5, 4020376), (8, 2512735), (10, 2010188), (20, 1005094), (40, 502547), (197, 102040), (394, 51020), (788, 25510), (985, 20408), (1576, 12755), (1970, 10204), (2551, 7880), (3940, 5102)]