20851265

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{12911}}^1$

素因数の和:12952

約数の個数: 16

約数和(自身を含む): 27889920

約数和(自身を除く): 7038655

約数列:

[1, 5, 17, 19, 85, 95, 323, 1615, 12911, 64555, 219487, 245309, 1097435, 1226545, 4170253, 20851265]

約数ペア:

[(1, 20851265), (5, 4170253), (17, 1226545), (19, 1097435), (85, 245309), (95, 219487), (323, 64555), (1615, 12911)]