39780455560

素因数分解:

$2^3\times 5^1\times {\mathrm{994511389}}^1$

素因数の和:994511400

約数の個数: 16

約数和(自身を含む): 89506025100

約数和(自身を除く): 49725569540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 994511389, 1989022778, 3978045556, 4972556945, 7956091112, 9945113890, 19890227780, 39780455560]

約数ペア:

[(1, 39780455560), (2, 19890227780), (4, 9945113890), (5, 7956091112), (8, 4972556945), (10, 3978045556), (20, 1989022778), (40, 994511389)]