21138896

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{103}}^1\times {\mathrm{127}}^1$

素因数の和:339

約数の個数: 40

約数和(自身を含む): 42092544

約数和(自身を除く): 20953648

約数列:

[1, 2, 4, 8, 16, 101, 103, 127, 202, 206, 254, 404, 412, 508, 808, 824, 1016, 1616, 1648, 2032, 10403, 12827, 13081, 20806, 25654, 26162, 41612, 51308, 52324, 83224, 102616, 104648, 166448, 205232, 209296, 1321181, 2642362, 5284724, 10569448, 21138896]

約数ペア:

[(1, 21138896), (2, 10569448), (4, 5284724), (8, 2642362), (16, 1321181), (101, 209296), (103, 205232), (127, 166448), (202, 104648), (206, 102616), (254, 83224), (404, 52324), (412, 51308), (508, 41612), (808, 26162), (824, 25654), (1016, 20806), (1616, 13081), (1648, 12827), (2032, 10403)]