21178672

素因数分解:

$2^4\times {\mathrm{157}}^1\times {\mathrm{8431}}^1$

素因数の和:8596

約数の個数: 20

約数和(自身を含む): 41299936

約数和(自身を除く): 20121264

約数列:

[1, 2, 4, 8, 16, 157, 314, 628, 1256, 2512, 8431, 16862, 33724, 67448, 134896, 1323667, 2647334, 5294668, 10589336, 21178672]

約数ペア:

[(1, 21178672), (2, 10589336), (4, 5294668), (8, 2647334), (16, 1323667), (157, 134896), (314, 67448), (628, 33724), (1256, 16862), (2512, 8431)]