18997435

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{311}}^1\times {\mathrm{643}}^1$

素因数の和:978

約数の個数: 16

約数和(自身を含む): 24111360

約数和(自身を除く): 5113925

約数列:

[1, 5, 19, 95, 311, 643, 1555, 3215, 5909, 12217, 29545, 61085, 199973, 999865, 3799487, 18997435]

約数ペア:

[(1, 18997435), (5, 3799487), (19, 999865), (95, 199973), (311, 61085), (643, 29545), (1555, 12217), (3215, 5909)]