21971888

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{80779}}^1$

素因数の和:80804

約数の個数: 20

約数和(自身を含む): 45075240

約数和(自身を除く): 23103352

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 80779, 161558, 323116, 646232, 1292464, 1373243, 2746486, 5492972, 10985944, 21971888]

約数ペア:

[(1, 21971888), (2, 10985944), (4, 5492972), (8, 2746486), (16, 1373243), (17, 1292464), (34, 646232), (68, 323116), (136, 161558), (272, 80779)]