18945995

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{643}}^1$

素因数の和:802

約数の個数: 16

約数和(自身を含む): 23369472

約数和(自身を除く): 4423477

約数列:

[1, 5, 71, 83, 355, 415, 643, 3215, 5893, 29465, 45653, 53369, 228265, 266845, 3789199, 18945995]

約数ペア:

[(1, 18945995), (5, 3789199), (71, 266845), (83, 228265), (355, 53369), (415, 45653), (643, 29465), (3215, 5893)]