21513513

素因数分解:

$3^1\times 7^1\times {\mathrm{853}}^1\times {\mathrm{1201}}^1$

素因数の和:2064

約数の個数: 16

約数和(自身を含む): 32848256

約数和(自身を除く): 11334743

約数列:

[1, 3, 7, 21, 853, 1201, 2559, 3603, 5971, 8407, 17913, 25221, 1024453, 3073359, 7171171, 21513513]

約数ペア:

[(1, 21513513), (3, 7171171), (7, 3073359), (21, 1024453), (853, 25221), (1201, 17913), (2559, 8407), (3603, 5971)]