18903899

素因数分解:

$7^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1\times {\mathrm{167}}^1$

素因数の和:434

約数の個数: 16

約数和(自身を含む): 22084608

約数和(自身を除く): 3180709

約数列:

[1, 7, 103, 157, 167, 721, 1099, 1169, 16171, 17201, 26219, 113197, 120407, 183533, 2700557, 18903899]

約数ペア:

[(1, 18903899), (7, 2700557), (103, 183533), (157, 120407), (167, 113197), (721, 26219), (1099, 17201), (1169, 16171)]