18840880

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5477}}^1$

素因数の和:5533

約数の個数: 40

約数和(自身を含む): 44831952

約数和(自身を除く): 25991072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5477, 10954, 21908, 27385, 43816, 54770, 87632, 109540, 219080, 235511, 438160, 471022, 942044, 1177555, 1884088, 2355110, 3768176, 4710220, 9420440, 18840880]

約数ペア:

[(1, 18840880), (2, 9420440), (4, 4710220), (5, 3768176), (8, 2355110), (10, 1884088), (16, 1177555), (20, 942044), (40, 471022), (43, 438160), (80, 235511), (86, 219080), (172, 109540), (215, 87632), (344, 54770), (430, 43816), (688, 27385), (860, 21908), (1720, 10954), (3440, 5477)]