20381305

素因数分解:

$5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{2029}}^1$

素因数の和:2089

約数の個数: 24

約数和(自身を含む): 29158920

約数和(自身を除く): 8777615

約数列:

[1, 5, 7, 35, 41, 49, 205, 245, 287, 1435, 2009, 2029, 10045, 10145, 14203, 71015, 83189, 99421, 415945, 497105, 582323, 2911615, 4076261, 20381305]

約数ペア:

[(1, 20381305), (5, 4076261), (7, 2911615), (35, 582323), (41, 497105), (49, 415945), (205, 99421), (245, 83189), (287, 71015), (1435, 14203), (2009, 10145), (2029, 10045)]