19915749

素因数分解:

$3^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{3259}}^1$

素因数の和:3369

約数の個数: 24

約数和(自身を含む): 33225920

約数和(自身を除く): 13310171

約数列:

[1, 3, 7, 9, 21, 63, 97, 291, 679, 873, 2037, 3259, 6111, 9777, 22813, 29331, 68439, 205317, 316123, 948369, 2212861, 2845107, 6638583, 19915749]

約数ペア:

[(1, 19915749), (3, 6638583), (7, 2845107), (9, 2212861), (21, 948369), (63, 316123), (97, 205317), (291, 68439), (679, 29331), (873, 22813), (2037, 9777), (3259, 6111)]