18531280

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5387}}^1$

素因数の和:5443

約数の個数: 40

約数和(自身を含む): 44095392

約数和(自身を除く): 25564112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5387, 10774, 21548, 26935, 43096, 53870, 86192, 107740, 215480, 231641, 430960, 463282, 926564, 1158205, 1853128, 2316410, 3706256, 4632820, 9265640, 18531280]

約数ペア:

[(1, 18531280), (2, 9265640), (4, 4632820), (5, 3706256), (8, 2316410), (10, 1853128), (16, 1158205), (20, 926564), (40, 463282), (43, 430960), (80, 231641), (86, 215480), (172, 107740), (215, 86192), (344, 53870), (430, 43096), (688, 26935), (860, 21548), (1720, 10774), (3440, 5387)]