18905005

素因数分解:

$5^1\times 7^1\times {\mathrm{421}}^1\times {\mathrm{1283}}^1$

素因数の和:1716

約数の個数: 16

約数和(自身を含む): 26008704

約数和(自身を除く): 7103699

約数列:

[1, 5, 7, 35, 421, 1283, 2105, 2947, 6415, 8981, 14735, 44905, 540143, 2700715, 3781001, 18905005]

約数ペア:

[(1, 18905005), (5, 3781001), (7, 2700715), (35, 540143), (421, 44905), (1283, 14735), (2105, 8981), (2947, 6415)]