18972037

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1\times {\mathrm{283}}^1$

素因数の和:508

約数の個数: 16

約数和(自身を含む): 22256512

約数和(自身を除く): 3284475

約数列:

[1, 7, 61, 157, 283, 427, 1099, 1981, 9577, 17263, 44431, 67039, 120841, 311017, 2710291, 18972037]

約数ペア:

[(1, 18972037), (7, 2710291), (61, 311017), (157, 120841), (283, 67039), (427, 44431), (1099, 17263), (1981, 9577)]