18684440

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1861}}^1$

素因数の和:2123

約数の個数: 32

約数和(自身を含む): 42230160

約数和(自身を除く): 23545720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 1861, 2008, 2510, 3722, 5020, 7444, 9305, 10040, 14888, 18610, 37220, 74440, 467111, 934222, 1868444, 2335555, 3736888, 4671110, 9342220, 18684440]

約数ペア:

[(1, 18684440), (2, 9342220), (4, 4671110), (5, 3736888), (8, 2335555), (10, 1868444), (20, 934222), (40, 467111), (251, 74440), (502, 37220), (1004, 18610), (1255, 14888), (1861, 10040), (2008, 9305), (2510, 7444), (3722, 5020)]