21980656

素因数分解:

$2^4\times {\mathrm{509}}^1\times {\mathrm{2699}}^1$

素因数の和:3216

約数の個数: 20

約数和(自身を含む): 42687000

約数和(自身を除く): 20706344

約数列:

[1, 2, 4, 8, 16, 509, 1018, 2036, 2699, 4072, 5398, 8144, 10796, 21592, 43184, 1373791, 2747582, 5495164, 10990328, 21980656]

約数ペア:

[(1, 21980656), (2, 10990328), (4, 5495164), (8, 2747582), (16, 1373791), (509, 43184), (1018, 21592), (2036, 10796), (2699, 8144), (4072, 5398)]