521397

素因数分解:

$3^4\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:210

約数の個数: 20

約数和(自身を含む): 802956

約数和(自身を除く): 281559

約数列:

[1, 3, 9, 27, 41, 81, 123, 157, 369, 471, 1107, 1413, 3321, 4239, 6437, 12717, 19311, 57933, 173799, 521397]

約数ペア:

[(1, 521397), (3, 173799), (9, 57933), (27, 19311), (41, 12717), (81, 6437), (123, 4239), (157, 3321), (369, 1413), (471, 1107)]