21003952

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30529}}^1$

素因数の和:30580

約数の個数: 20

約数和(自身を含む): 41642920

約数和(自身を除く): 20638968

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30529, 61058, 122116, 244232, 488464, 1312747, 2625494, 5250988, 10501976, 21003952]

約数ペア:

[(1, 21003952), (2, 10501976), (4, 5250988), (8, 2625494), (16, 1312747), (43, 488464), (86, 244232), (172, 122116), (344, 61058), (688, 30529)]