20653480

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2621}}^1$

素因数の和:2829

約数の個数: 32

約数和(自身を含む): 46724040

約数和(自身を除く): 26070560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2621, 3940, 5242, 7880, 10484, 13105, 20968, 26210, 52420, 104840, 516337, 1032674, 2065348, 2581685, 4130696, 5163370, 10326740, 20653480]

約数ペア:

[(1, 20653480), (2, 10326740), (4, 5163370), (5, 4130696), (8, 2581685), (10, 2065348), (20, 1032674), (40, 516337), (197, 104840), (394, 52420), (788, 26210), (985, 20968), (1576, 13105), (1970, 10484), (2621, 7880), (3940, 5242)]