128790010

素因数分解:

$2^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{31489}}^1$

素因数の和:31905

約数の個数: 16

約数和(自身を含む): 232396200

約数和(自身を除く): 103606190

約数列:

[1, 2, 5, 10, 409, 818, 2045, 4090, 31489, 62978, 157445, 314890, 12879001, 25758002, 64395005, 128790010]

約数ペア:

[(1, 128790010), (2, 64395005), (5, 25758002), (10, 12879001), (409, 314890), (818, 157445), (2045, 62978), (4090, 31489)]