19937619

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 33546240

約数和(自身を除く): 13608621

約数列:

[1, 3, 9, 13, 23, 31, 39, 69, 93, 117, 207, 239, 279, 299, 403, 713, 717, 897, 1209, 2139, 2151, 2691, 3107, 3627, 5497, 6417, 7409, 9269, 9321, 16491, 22227, 27807, 27963, 49473, 66681, 71461, 83421, 96317, 170407, 214383, 288951, 511221, 643149, 866853, 1533663, 2215291, 6645873, 19937619]

約数ペア:

[(1, 19937619), (3, 6645873), (9, 2215291), (13, 1533663), (23, 866853), (31, 643149), (39, 511221), (69, 288951), (93, 214383), (117, 170407), (207, 96317), (239, 83421), (279, 71461), (299, 66681), (403, 49473), (713, 27963), (717, 27807), (897, 22227), (1209, 16491), (2139, 9321), (2151, 9269), (2691, 7409), (3107, 6417), (3627, 5497)]