18837959

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1\times {\mathrm{281}}^1$

素因数の和:506

約数の個数: 16

約数和(自身を含む): 22099776

約数和(自身を除く): 3261817

約数列:

[1, 7, 61, 157, 281, 427, 1099, 1967, 9577, 17141, 44117, 67039, 119987, 308819, 2691137, 18837959]

約数ペア:

[(1, 18837959), (7, 2691137), (61, 308819), (157, 119987), (281, 67039), (427, 44117), (1099, 17141), (1967, 9577)]