20897716

素因数分解:

$2^2\times 7^2\times {\mathrm{106621}}^1$

素因数の和:106639

約数の個数: 18

約数和(自身を含む): 42542178

約数和(自身を除く): 21644462

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 106621, 213242, 426484, 746347, 1492694, 2985388, 5224429, 10448858, 20897716]

約数ペア:

[(1, 20897716), (2, 10448858), (4, 5224429), (7, 2985388), (14, 1492694), (28, 746347), (49, 426484), (98, 213242), (196, 106621)]