18978004

素因数分解:

$2^2\times {\mathrm{89}}^1\times {\mathrm{53309}}^1$

素因数の和:53402

約数の個数: 12

約数和(自身を含む): 33585300

約数和(自身を除く): 14607296

約数列:

[1, 2, 4, 89, 178, 356, 53309, 106618, 213236, 4744501, 9489002, 18978004]

約数ペア:

[(1, 18978004), (2, 9489002), (4, 4744501), (89, 213236), (178, 106618), (356, 53309)]