81381680

素因数分解:

$2^4\times 5^1\times {\mathrm{587}}^1\times {\mathrm{1733}}^1$

素因数の和:2333

約数の個数: 40

約数和(自身を含む): 189644112

約数和(自身を除く): 108262432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 587, 1174, 1733, 2348, 2935, 3466, 4696, 5870, 6932, 8665, 9392, 11740, 13864, 17330, 23480, 27728, 34660, 46960, 69320, 138640, 1017271, 2034542, 4069084, 5086355, 8138168, 10172710, 16276336, 20345420, 40690840, 81381680]

約数ペア:

[(1, 81381680), (2, 40690840), (4, 20345420), (5, 16276336), (8, 10172710), (10, 8138168), (16, 5086355), (20, 4069084), (40, 2034542), (80, 1017271), (587, 138640), (1174, 69320), (1733, 46960), (2348, 34660), (2935, 27728), (3466, 23480), (4696, 17330), (5870, 13864), (6932, 11740), (8665, 9392)]