28783881

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{9721}}^1$

素因数の和:9781

約数の個数: 24

約数和(自身を含む): 48532224

約数和(自身を除く): 19748343

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 9721, 29163, 68047, 87489, 204141, 456887, 612423, 1370661, 3198209, 4111983, 9594627, 28783881]

約数ペア:

[(1, 28783881), (3, 9594627), (7, 4111983), (9, 3198209), (21, 1370661), (47, 612423), (63, 456887), (141, 204141), (329, 87489), (423, 68047), (987, 29163), (2961, 9721)]