18915860

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8677}}^1$

素因数の和:8795

約数の個数: 24

約数和(自身を含む): 40092360

約数和(自身を除く): 21176500

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8677, 17354, 34708, 43385, 86770, 173540, 945793, 1891586, 3783172, 4728965, 9457930, 18915860]

約数ペア:

[(1, 18915860), (2, 9457930), (4, 4728965), (5, 3783172), (10, 1891586), (20, 945793), (109, 173540), (218, 86770), (436, 43385), (545, 34708), (1090, 17354), (2180, 8677)]