20685320

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12613}}^1$

素因数の和:12665

約数の個数: 32

約数和(自身を含む): 47680920

約数和(自身を除く): 26995600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12613, 25226, 50452, 63065, 100904, 126130, 252260, 504520, 517133, 1034266, 2068532, 2585665, 4137064, 5171330, 10342660, 20685320]

約数ペア:

[(1, 20685320), (2, 10342660), (4, 5171330), (5, 4137064), (8, 2585665), (10, 2068532), (20, 1034266), (40, 517133), (41, 504520), (82, 252260), (164, 126130), (205, 100904), (328, 63065), (410, 50452), (820, 25226), (1640, 12613)]