18993745

素因数分解:

$5^1\times {\mathrm{23}}^2\times {\mathrm{43}}^1\times {\mathrm{167}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 24526656

約数和(自身を除く): 5532911

約数列:

[1, 5, 23, 43, 115, 167, 215, 529, 835, 989, 2645, 3841, 4945, 7181, 19205, 22747, 35905, 88343, 113735, 165163, 441715, 825815, 3798749, 18993745]

約数ペア:

[(1, 18993745), (5, 3798749), (23, 825815), (43, 441715), (115, 165163), (167, 113735), (215, 88343), (529, 35905), (835, 22747), (989, 19205), (2645, 7181), (3841, 4945)]