21178448

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{103}}^1\times {\mathrm{181}}^1$

素因数の和:363

約数の個数: 40

約数和(自身を含む): 42247296

約数和(自身を除く): 21068848

約数列:

[1, 2, 4, 8, 16, 71, 103, 142, 181, 206, 284, 362, 412, 568, 724, 824, 1136, 1448, 1648, 2896, 7313, 12851, 14626, 18643, 25702, 29252, 37286, 51404, 58504, 74572, 102808, 117008, 149144, 205616, 298288, 1323653, 2647306, 5294612, 10589224, 21178448]

約数ペア:

[(1, 21178448), (2, 10589224), (4, 5294612), (8, 2647306), (16, 1323653), (71, 298288), (103, 205616), (142, 149144), (181, 117008), (206, 102808), (284, 74572), (362, 58504), (412, 51404), (568, 37286), (724, 29252), (824, 25702), (1136, 18643), (1448, 14626), (1648, 12851), (2896, 7313)]