21665643

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{2551}}^1$

素因数の和:2722

約数の個数: 16

約数和(自身を含む): 30624000

約数和(自身を除く): 8958357

約数列:

[1, 3, 19, 57, 149, 447, 2551, 2831, 7653, 8493, 48469, 145407, 380099, 1140297, 7221881, 21665643]

約数ペア:

[(1, 21665643), (3, 7221881), (19, 1140297), (57, 380099), (149, 145407), (447, 48469), (2551, 8493), (2831, 7653)]