18687380

素因数分解:

$2^2\times 5^1\times {\mathrm{449}}^1\times {\mathrm{2081}}^1$

素因数の和:2539

約数の個数: 24

約数和(自身を含む): 39349800

約数和(自身を除く): 20662420

約数列:

[1, 2, 4, 5, 10, 20, 449, 898, 1796, 2081, 2245, 4162, 4490, 8324, 8980, 10405, 20810, 41620, 934369, 1868738, 3737476, 4671845, 9343690, 18687380]

約数ペア:

[(1, 18687380), (2, 9343690), (4, 4671845), (5, 3737476), (10, 1868738), (20, 934369), (449, 41620), (898, 20810), (1796, 10405), (2081, 8980), (2245, 8324), (4162, 4490)]