281301993

素因数分解:

$3^2\times 7^2\times {\mathrm{637873}}^1$

素因数の和:637893

約数の個数: 18

約数和(自身を含む): 472664634

約数和(自身を除く): 191362641

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 637873, 1913619, 4465111, 5740857, 13395333, 31255777, 40185999, 93767331, 281301993]

約数ペア:

[(1, 281301993), (3, 93767331), (7, 40185999), (9, 31255777), (21, 13395333), (49, 5740857), (63, 4465111), (147, 1913619), (441, 637873)]