128528240

素因数分解:

$2^4\times 5^1\times {\mathrm{1606603}}^1$

素因数の和:1606616

約数の個数: 20

約数和(自身を含む): 298828344

約数和(自身を除く): 170300104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1606603, 3213206, 6426412, 8033015, 12852824, 16066030, 25705648, 32132060, 64264120, 128528240]

約数ペア:

[(1, 128528240), (2, 64264120), (4, 32132060), (5, 25705648), (8, 16066030), (10, 12852824), (16, 8033015), (20, 6426412), (40, 3213206), (80, 1606603)]