31181283

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{6971}}^1$

素因数の和:7055

約数の個数: 24

約数和(自身を含む): 52206336

約数和(自身を除く): 21025053

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 6971, 20913, 48797, 62739, 146391, 439173, 494941, 1484823, 3464587, 4454469, 10393761, 31181283]

約数ペア:

[(1, 31181283), (3, 10393761), (7, 4454469), (9, 3464587), (21, 1484823), (63, 494941), (71, 439173), (213, 146391), (497, 62739), (639, 48797), (1491, 20913), (4473, 6971)]