81665080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{291661}}^1$

素因数の和:291679

約数の個数: 32

約数和(自身を含む): 209996640

約数和(自身を除く): 128331560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 291661, 583322, 1166644, 1458305, 2041627, 2333288, 2916610, 4083254, 5833220, 8166508, 10208135, 11666440, 16333016, 20416270, 40832540, 81665080]

約数ペア:

[(1, 81665080), (2, 40832540), (4, 20416270), (5, 16333016), (7, 11666440), (8, 10208135), (10, 8166508), (14, 5833220), (20, 4083254), (28, 2916610), (35, 2333288), (40, 2041627), (56, 1458305), (70, 1166644), (140, 583322), (280, 291661)]