20684900

素因数分解:

$2^2\times 5^2\times {\mathrm{131}}^1\times {\mathrm{1579}}^1$

素因数の和:1724

約数の個数: 36

約数和(自身を含む): 45257520

約数和(自身を除く): 24572620

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 131, 262, 524, 655, 1310, 1579, 2620, 3158, 3275, 6316, 6550, 7895, 13100, 15790, 31580, 39475, 78950, 157900, 206849, 413698, 827396, 1034245, 2068490, 4136980, 5171225, 10342450, 20684900]

約数ペア:

[(1, 20684900), (2, 10342450), (4, 5171225), (5, 4136980), (10, 2068490), (20, 1034245), (25, 827396), (50, 413698), (100, 206849), (131, 157900), (262, 78950), (524, 39475), (655, 31580), (1310, 15790), (1579, 13100), (2620, 7895), (3158, 6550), (3275, 6316)]