21270513

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:333

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 10985487

約数列:

[1, 3, 11, 33, 41, 79, 123, 199, 237, 451, 597, 869, 1353, 2189, 2607, 3239, 6567, 8159, 9717, 15721, 24477, 35629, 47163, 89749, 106887, 172931, 269247, 518793, 644561, 1933683, 7090171, 21270513]

約数ペア:

[(1, 21270513), (3, 7090171), (11, 1933683), (33, 644561), (41, 518793), (79, 269247), (123, 172931), (199, 106887), (237, 89749), (451, 47163), (597, 35629), (869, 24477), (1353, 15721), (2189, 9717), (2607, 8159), (3239, 6567)]