20617840

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8887}}^1$

素因数の和:8929

約数の個数: 40

約数和(自身を含む): 49595040

約数和(自身を除く): 28977200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 8887, 17774, 35548, 44435, 71096, 88870, 142192, 177740, 257723, 355480, 515446, 710960, 1030892, 1288615, 2061784, 2577230, 4123568, 5154460, 10308920, 20617840]

約数ペア:

[(1, 20617840), (2, 10308920), (4, 5154460), (5, 4123568), (8, 2577230), (10, 2061784), (16, 1288615), (20, 1030892), (29, 710960), (40, 515446), (58, 355480), (80, 257723), (116, 177740), (145, 142192), (232, 88870), (290, 71096), (464, 44435), (580, 35548), (1160, 17774), (2320, 8887)]