19638665

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1\times {\mathrm{439}}^1$

素因数の和:856

約数の個数: 16

約数和(自身を含む): 24710400

約数和(自身を除く): 5071735

約数列:

[1, 5, 23, 115, 389, 439, 1945, 2195, 8947, 10097, 44735, 50485, 170771, 853855, 3927733, 19638665]

約数ペア:

[(1, 19638665), (5, 3927733), (23, 853855), (115, 170771), (389, 50485), (439, 44735), (1945, 10097), (2195, 8947)]