20154575

素因数分解:

$5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{53}}^2$

素因数の和:164

約数の個数: 36

約数和(自身を含む): 29821008

約数和(自身を除く): 9666433

約数列:

[1, 5, 7, 25, 35, 41, 53, 175, 205, 265, 287, 371, 1025, 1325, 1435, 1855, 2173, 2809, 7175, 9275, 10865, 14045, 15211, 19663, 54325, 70225, 76055, 98315, 115169, 380275, 491575, 575845, 806183, 2879225, 4030915, 20154575]

約数ペア:

[(1, 20154575), (5, 4030915), (7, 2879225), (25, 806183), (35, 575845), (41, 491575), (53, 380275), (175, 115169), (205, 98315), (265, 76055), (287, 70225), (371, 54325), (1025, 19663), (1325, 15211), (1435, 14045), (1855, 10865), (2173, 9275), (2809, 7175)]