18879965

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{4091}}^1$

素因数の和:4180

約数の個数: 16

約数和(自身を含む): 24748416

約数和(自身を除く): 5868451

約数列:

[1, 5, 13, 65, 71, 355, 923, 4091, 4615, 20455, 53183, 265915, 290461, 1452305, 3775993, 18879965]

約数ペア:

[(1, 18879965), (5, 3775993), (13, 1452305), (65, 290461), (71, 265915), (355, 53183), (923, 20455), (4091, 4615)]