17989881

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 30708864

約数和(自身を除く): 12718983

約数列:

[1, 3, 7, 13, 21, 37, 39, 91, 111, 137, 169, 259, 273, 411, 481, 507, 777, 959, 1183, 1443, 1781, 2877, 3367, 3549, 5069, 5343, 6253, 10101, 12467, 15207, 18759, 23153, 35483, 37401, 43771, 65897, 69459, 106449, 131313, 162071, 197691, 461279, 486213, 856661, 1383837, 2569983, 5996627, 17989881]

約数ペア:

[(1, 17989881), (3, 5996627), (7, 2569983), (13, 1383837), (21, 856661), (37, 486213), (39, 461279), (91, 197691), (111, 162071), (137, 131313), (169, 106449), (259, 69459), (273, 65897), (411, 43771), (481, 37401), (507, 35483), (777, 23153), (959, 18759), (1183, 15207), (1443, 12467), (1781, 10101), (2877, 6253), (3367, 5343), (3549, 5069)]