20542025

素因数分解:

$5^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{409}}^1$

素因数の和:474

約数の個数: 36

約数和(自身を含む): 30427740

約数和(自身を除く): 9885715

約数列:

[1, 5, 7, 25, 35, 41, 49, 175, 205, 245, 287, 409, 1025, 1225, 1435, 2009, 2045, 2863, 7175, 10045, 10225, 14315, 16769, 20041, 50225, 71575, 83845, 100205, 117383, 419225, 501025, 586915, 821681, 2934575, 4108405, 20542025]

約数ペア:

[(1, 20542025), (5, 4108405), (7, 2934575), (25, 821681), (35, 586915), (41, 501025), (49, 419225), (175, 117383), (205, 100205), (245, 83845), (287, 71575), (409, 50225), (1025, 20041), (1225, 16769), (1435, 14315), (2009, 10225), (2045, 10045), (2863, 7175)]