12966640

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1487}}^1$

素因数の和:1609

約数の個数: 40

約数和(自身を含む): 30444480

約数和(自身を除く): 17477840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1487, 1744, 2180, 2974, 4360, 5948, 7435, 8720, 11896, 14870, 23792, 29740, 59480, 118960, 162083, 324166, 648332, 810415, 1296664, 1620830, 2593328, 3241660, 6483320, 12966640]

約数ペア:

[(1, 12966640), (2, 6483320), (4, 3241660), (5, 2593328), (8, 1620830), (10, 1296664), (16, 810415), (20, 648332), (40, 324166), (80, 162083), (109, 118960), (218, 59480), (436, 29740), (545, 23792), (872, 14870), (1090, 11896), (1487, 8720), (1744, 7435), (2180, 5948), (2974, 4360)]