129128840

素因数分解:

$2^3\times 5^1\times {\mathrm{3228221}}^1$

素因数の和:3228232

約数の個数: 16

約数和(自身を含む): 290539980

約数和(自身を除く): 161411140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3228221, 6456442, 12912884, 16141105, 25825768, 32282210, 64564420, 129128840]

約数ペア:

[(1, 129128840), (2, 64564420), (4, 32282210), (5, 25825768), (8, 16141105), (10, 12912884), (20, 6456442), (40, 3228221)]