18239740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{167}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 39739392

約数和(自身を除く): 21499652

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 127, 167, 172, 215, 254, 334, 430, 508, 635, 668, 835, 860, 1270, 1670, 2540, 3340, 5461, 7181, 10922, 14362, 21209, 21844, 27305, 28724, 35905, 42418, 54610, 71810, 84836, 106045, 109220, 143620, 212090, 424180, 911987, 1823974, 3647948, 4559935, 9119870, 18239740]

約数ペア:

[(1, 18239740), (2, 9119870), (4, 4559935), (5, 3647948), (10, 1823974), (20, 911987), (43, 424180), (86, 212090), (127, 143620), (167, 109220), (172, 106045), (215, 84836), (254, 71810), (334, 54610), (430, 42418), (508, 35905), (635, 28724), (668, 27305), (835, 21844), (860, 21209), (1270, 14362), (1670, 10922), (2540, 7181), (3340, 5461)]