18814220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{167}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 40981248

約数和(自身を除く): 22167028

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 131, 167, 172, 215, 262, 334, 430, 524, 655, 668, 835, 860, 1310, 1670, 2620, 3340, 5633, 7181, 11266, 14362, 21877, 22532, 28165, 28724, 35905, 43754, 56330, 71810, 87508, 109385, 112660, 143620, 218770, 437540, 940711, 1881422, 3762844, 4703555, 9407110, 18814220]

約数ペア:

[(1, 18814220), (2, 9407110), (4, 4703555), (5, 3762844), (10, 1881422), (20, 940711), (43, 437540), (86, 218770), (131, 143620), (167, 112660), (172, 109385), (215, 87508), (262, 71810), (334, 56330), (430, 43754), (524, 35905), (655, 28724), (668, 28165), (835, 22532), (860, 21877), (1310, 14362), (1670, 11266), (2620, 7181), (3340, 5633)]