21427888

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78779}}^1$

素因数の和:78804

約数の個数: 20

約数和(自身を含む): 43959240

約数和(自身を除く): 22531352

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78779, 157558, 315116, 630232, 1260464, 1339243, 2678486, 5356972, 10713944, 21427888]

約数ペア:

[(1, 21427888), (2, 10713944), (4, 5356972), (8, 2678486), (16, 1339243), (17, 1260464), (34, 630232), (68, 315116), (136, 157558), (272, 78779)]