18987416

素因数分解:

$2^3\times 7^1\times {\mathrm{409}}^1\times {\mathrm{829}}^1$

素因数の和:1251

約数の個数: 32

約数和(自身を含む): 40836000

約数和(自身を除く): 21848584

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 409, 818, 829, 1636, 1658, 2863, 3272, 3316, 5726, 5803, 6632, 11452, 11606, 22904, 23212, 46424, 339061, 678122, 1356244, 2373427, 2712488, 4746854, 9493708, 18987416]

約数ペア:

[(1, 18987416), (2, 9493708), (4, 4746854), (7, 2712488), (8, 2373427), (14, 1356244), (28, 678122), (56, 339061), (409, 46424), (818, 23212), (829, 22904), (1636, 11606), (1658, 11452), (2863, 6632), (3272, 5803), (3316, 5726)]