21317679

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{457}}^1$

素因数の和:607

約数の個数: 24

約数和(自身を含む): 31722912

約数和(自身を除く): 10405233

約数列:

[1, 3, 9, 71, 73, 213, 219, 457, 639, 657, 1371, 4113, 5183, 15549, 32447, 33361, 46647, 97341, 100083, 292023, 300249, 2368631, 7105893, 21317679]

約数ペア:

[(1, 21317679), (3, 7105893), (9, 2368631), (71, 300249), (73, 292023), (213, 100083), (219, 97341), (457, 46647), (639, 33361), (657, 32447), (1371, 15549), (4113, 5183)]