20389075

素因数分解:

$5^2\times 7^1\times {\mathrm{263}}^1\times {\mathrm{443}}^1$

素因数の和:723

約数の個数: 24

約数和(自身を含む): 29069568

約数和(自身を除く): 8680493

約数列:

[1, 5, 7, 25, 35, 175, 263, 443, 1315, 1841, 2215, 3101, 6575, 9205, 11075, 15505, 46025, 77525, 116509, 582545, 815563, 2912725, 4077815, 20389075]

約数ペア:

[(1, 20389075), (5, 4077815), (7, 2912725), (25, 815563), (35, 582545), (175, 116509), (263, 77525), (443, 46025), (1315, 15505), (1841, 11075), (2215, 9205), (3101, 6575)]