21497968

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{70717}}^1$

素因数の和:70744

約数の個数: 20

約数和(自身を含む): 43845160

約数和(自身を除く): 22347192

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 70717, 141434, 282868, 565736, 1131472, 1343623, 2687246, 5374492, 10748984, 21497968]

約数ペア:

[(1, 21497968), (2, 10748984), (4, 5374492), (8, 2687246), (16, 1343623), (19, 1131472), (38, 565736), (76, 282868), (152, 141434), (304, 70717)]