21286916

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{40013}}^1$

素因数の和:40043

約数の個数: 24

約数和(自身を含む): 44815680

約数和(自身を除く): 23528764

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 532, 40013, 80026, 160052, 280091, 560182, 760247, 1120364, 1520494, 3040988, 5321729, 10643458, 21286916]

約数ペア:

[(1, 21286916), (2, 10643458), (4, 5321729), (7, 3040988), (14, 1520494), (19, 1120364), (28, 760247), (38, 560182), (76, 280091), (133, 160052), (266, 80026), (532, 40013)]