21328960

素因数分解:

$2^6\times 5^1\times {\mathrm{66653}}^1$

素因数の和:66670

約数の個数: 28

約数和(自身を含む): 50790348

約数和(自身を除く): 29461388

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 66653, 133306, 266612, 333265, 533224, 666530, 1066448, 1333060, 2132896, 2666120, 4265792, 5332240, 10664480, 21328960]

約数ペア:

[(1, 21328960), (2, 10664480), (4, 5332240), (5, 4265792), (8, 2666120), (10, 2132896), (16, 1333060), (20, 1066448), (32, 666530), (40, 533224), (64, 333265), (80, 266612), (160, 133306), (320, 66653)]