19875565

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{401}}^1\times {\mathrm{431}}^1$

素因数の和:860

約数の個数: 16

約数和(自身を含む): 25007616

約数和(自身を除く): 5132051

約数列:

[1, 5, 23, 115, 401, 431, 2005, 2155, 9223, 9913, 46115, 49565, 172831, 864155, 3975113, 19875565]

約数ペア:

[(1, 19875565), (5, 3975113), (23, 864155), (115, 172831), (401, 49565), (431, 46115), (2005, 9913), (2155, 9223)]