20521936

素因数分解:

$2^4\times {\mathrm{131}}^1\times {\mathrm{9791}}^1$

素因数の和:9930

約数の個数: 20

約数和(自身を含む): 40068864

約数和(自身を除く): 19546928

約数列:

[1, 2, 4, 8, 16, 131, 262, 524, 1048, 2096, 9791, 19582, 39164, 78328, 156656, 1282621, 2565242, 5130484, 10260968, 20521936]

約数ペア:

[(1, 20521936), (2, 10260968), (4, 5130484), (8, 2565242), (16, 1282621), (131, 156656), (262, 78328), (524, 39164), (1048, 19582), (2096, 9791)]