18788848

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{877}}^1$

素因数の和:1001

約数の個数: 40

約数和(自身を含む): 39629408

約数和(自身を除く): 20840560

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 103, 104, 206, 208, 412, 824, 877, 1339, 1648, 1754, 2678, 3508, 5356, 7016, 10712, 11401, 14032, 21424, 22802, 45604, 90331, 91208, 180662, 182416, 361324, 722648, 1174303, 1445296, 2348606, 4697212, 9394424, 18788848]

約数ペア:

[(1, 18788848), (2, 9394424), (4, 4697212), (8, 2348606), (13, 1445296), (16, 1174303), (26, 722648), (52, 361324), (103, 182416), (104, 180662), (206, 91208), (208, 90331), (412, 45604), (824, 22802), (877, 21424), (1339, 14032), (1648, 11401), (1754, 10712), (2678, 7016), (3508, 5356)]