20199980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43913}}^1$

素因数の和:43945

約数の個数: 24

約数和(自身を含む): 44265312

約数和(自身を除く): 24065332

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 43913, 87826, 175652, 219565, 439130, 878260, 1009999, 2019998, 4039996, 5049995, 10099990, 20199980]

約数ペア:

[(1, 20199980), (2, 10099990), (4, 5049995), (5, 4039996), (10, 2019998), (20, 1009999), (23, 878260), (46, 439130), (92, 219565), (115, 175652), (230, 87826), (460, 43913)]