19709781

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:162

約数の個数: 64

約数和(自身を含む): 35008512

約数和(自身を除く): 15298731

約数列:

[1, 3, 7, 13, 21, 23, 39, 43, 69, 73, 91, 129, 161, 219, 273, 299, 301, 483, 511, 559, 897, 903, 949, 989, 1533, 1677, 1679, 2093, 2847, 2967, 3139, 3913, 5037, 6279, 6643, 6923, 9417, 11739, 11753, 12857, 19929, 20769, 21827, 21973, 35259, 38571, 40807, 65481, 65919, 72197, 89999, 122421, 152789, 216591, 269997, 285649, 458367, 505379, 856947, 938561, 1516137, 2815683, 6569927, 19709781]

約数ペア:

[(1, 19709781), (3, 6569927), (7, 2815683), (13, 1516137), (21, 938561), (23, 856947), (39, 505379), (43, 458367), (69, 285649), (73, 269997), (91, 216591), (129, 152789), (161, 122421), (219, 89999), (273, 72197), (299, 65919), (301, 65481), (483, 40807), (511, 38571), (559, 35259), (897, 21973), (903, 21827), (949, 20769), (989, 19929), (1533, 12857), (1677, 11753), (1679, 11739), (2093, 9417), (2847, 6923), (2967, 6643), (3139, 6279), (3913, 5037)]