81440680

素因数分解:

$2^3\times 5^1\times {\mathrm{2036017}}^1$

素因数の和:2036028

約数の個数: 16

約数和(自身を含む): 183241620

約数和(自身を除く): 101800940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2036017, 4072034, 8144068, 10180085, 16288136, 20360170, 40720340, 81440680]

約数ペア:

[(1, 81440680), (2, 40720340), (4, 20360170), (5, 16288136), (8, 10180085), (10, 8144068), (20, 4072034), (40, 2036017)]