128809840

素因数分解:

$2^4\times 5^1\times {\mathrm{1610123}}^1$

素因数の和:1610136

約数の個数: 20

約数和(自身を含む): 299483064

約数和(自身を除く): 170673224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1610123, 3220246, 6440492, 8050615, 12880984, 16101230, 25761968, 32202460, 64404920, 128809840]

約数ペア:

[(1, 128809840), (2, 64404920), (4, 32202460), (5, 25761968), (8, 16101230), (10, 12880984), (16, 8050615), (20, 6440492), (40, 3220246), (80, 1610123)]