20656784

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{31489}}^1$

素因数の和:31538

約数の個数: 20

約数和(自身を含む): 40999980

約数和(自身を除く): 20343196

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 31489, 62978, 125956, 251912, 503824, 1291049, 2582098, 5164196, 10328392, 20656784]

約数ペア:

[(1, 20656784), (2, 10328392), (4, 5164196), (8, 2582098), (16, 1291049), (41, 503824), (82, 251912), (164, 125956), (328, 62978), (656, 31489)]