21519909

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{3271}}^1$

素因数の和:3337

約数の個数: 24

約数和(自身を含む): 33688512

約数和(自身を除く): 12168603

約数列:

[1, 3, 9, 17, 43, 51, 129, 153, 387, 731, 2193, 3271, 6579, 9813, 29439, 55607, 140653, 166821, 421959, 500463, 1265877, 2391101, 7173303, 21519909]

約数ペア:

[(1, 21519909), (3, 7173303), (9, 2391101), (17, 1265877), (43, 500463), (51, 421959), (129, 166821), (153, 140653), (387, 55607), (731, 29439), (2193, 9813), (3271, 6579)]