21876981

素因数分解:

$3^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{3461}}^1$

素因数の和:3521

約数の個数: 24

約数和(自身を含む): 34730784

約数和(自身を除く): 12853803

約数列:

[1, 3, 7, 21, 43, 49, 129, 147, 301, 903, 2107, 3461, 6321, 10383, 24227, 72681, 148823, 169589, 446469, 508767, 1041761, 3125283, 7292327, 21876981]

約数ペア:

[(1, 21876981), (3, 7292327), (7, 3125283), (21, 1041761), (43, 508767), (49, 446469), (129, 169589), (147, 148823), (301, 72681), (903, 24227), (2107, 10383), (3461, 6321)]