21663952

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{71263}}^1$

素因数の和:71290

約数の個数: 20

約数和(自身を含む): 44183680

約数和(自身を除く): 22519728

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 71263, 142526, 285052, 570104, 1140208, 1353997, 2707994, 5415988, 10831976, 21663952]

約数ペア:

[(1, 21663952), (2, 10831976), (4, 5415988), (8, 2707994), (16, 1353997), (19, 1140208), (38, 570104), (76, 285052), (152, 142526), (304, 71263)]