21371344

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{31063}}^1$

素因数の和:31114

約数の個数: 20

約数和(自身を含む): 42371296

約数和(自身を除く): 20999952

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 31063, 62126, 124252, 248504, 497008, 1335709, 2671418, 5342836, 10685672, 21371344]

約数ペア:

[(1, 21371344), (2, 10685672), (4, 5342836), (8, 2671418), (16, 1335709), (43, 497008), (86, 248504), (172, 124252), (344, 62126), (688, 31063)]