19866903

素因数分解:

$3^1\times 7^3\times {\mathrm{43}}^1\times {\mathrm{449}}^1$

素因数の和:516

約数の個数: 32

約数和(自身を含む): 31680000

約数和(自身を除く): 11813097

約数列:

[1, 3, 7, 21, 43, 49, 129, 147, 301, 343, 449, 903, 1029, 1347, 2107, 3143, 6321, 9429, 14749, 19307, 22001, 44247, 57921, 66003, 135149, 154007, 405447, 462021, 946043, 2838129, 6622301, 19866903]

約数ペア:

[(1, 19866903), (3, 6622301), (7, 2838129), (21, 946043), (43, 462021), (49, 405447), (129, 154007), (147, 135149), (301, 66003), (343, 57921), (449, 44247), (903, 22001), (1029, 19307), (1347, 14749), (2107, 9429), (3143, 6321)]