18461720

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{4481}}^1$

素因数の和:4595

約数の個数: 32

約数和(自身を含む): 41951520

約数和(自身を除く): 23489800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 4481, 8962, 17924, 22405, 35848, 44810, 89620, 179240, 461543, 923086, 1846172, 2307715, 3692344, 4615430, 9230860, 18461720]

約数ペア:

[(1, 18461720), (2, 9230860), (4, 4615430), (5, 3692344), (8, 2307715), (10, 1846172), (20, 923086), (40, 461543), (103, 179240), (206, 89620), (412, 44810), (515, 35848), (824, 22405), (1030, 17924), (2060, 8962), (4120, 4481)]