21388984

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{140717}}^1$

素因数の和:140742

約数の個数: 16

約数和(自身を含む): 42215400

約数和(自身を除く): 20826416

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 140717, 281434, 562868, 1125736, 2673623, 5347246, 10694492, 21388984]

約数ペア:

[(1, 21388984), (2, 10694492), (4, 5347246), (8, 2673623), (19, 1125736), (38, 562868), (76, 281434), (152, 140717)]