19947663

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 32348160

約数和(自身を除く): 12400497

約数列:

[1, 3, 9, 19, 31, 53, 57, 71, 93, 159, 171, 213, 279, 477, 589, 639, 1007, 1349, 1643, 1767, 2201, 3021, 3763, 4047, 4929, 5301, 6603, 9063, 11289, 12141, 14787, 19809, 31217, 33867, 41819, 71497, 93651, 116653, 125457, 214491, 280953, 349959, 376371, 643473, 1049877, 2216407, 6649221, 19947663]

約数ペア:

[(1, 19947663), (3, 6649221), (9, 2216407), (19, 1049877), (31, 643473), (53, 376371), (57, 349959), (71, 280953), (93, 214491), (159, 125457), (171, 116653), (213, 93651), (279, 71497), (477, 41819), (589, 33867), (639, 31217), (1007, 19809), (1349, 14787), (1643, 12141), (1767, 11289), (2201, 9063), (3021, 6603), (3763, 5301), (4047, 4929)]