18784405

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1\times {\mathrm{991}}^1$

素因数の和:1236

約数の個数: 16

約数和(自身を含む): 23998464

約数和(自身を除く): 5214059

約数列:

[1, 5, 17, 85, 223, 991, 1115, 3791, 4955, 16847, 18955, 84235, 220993, 1104965, 3756881, 18784405]

約数ペア:

[(1, 18784405), (5, 3756881), (17, 1104965), (85, 220993), (223, 84235), (991, 18955), (1115, 16847), (3791, 4955)]