20180440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72073}}^1$

素因数の和:72091

約数の個数: 32

約数和(自身を含む): 51893280

約数和(自身を除く): 31712840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72073, 144146, 288292, 360365, 504511, 576584, 720730, 1009022, 1441460, 2018044, 2522555, 2882920, 4036088, 5045110, 10090220, 20180440]

約数ペア:

[(1, 20180440), (2, 10090220), (4, 5045110), (5, 4036088), (7, 2882920), (8, 2522555), (10, 2018044), (14, 1441460), (20, 1009022), (28, 720730), (35, 576584), (40, 504511), (56, 360365), (70, 288292), (140, 144146), (280, 72073)]