20640969

素因数分解:

$3^2\times {\mathrm{73}}^1\times {\mathrm{89}}^1\times {\mathrm{353}}^1$

素因数の和:521

約数の個数: 24

約数和(自身を含む): 30649320

約数和(自身を除く): 10008351

約数列:

[1, 3, 9, 73, 89, 219, 267, 353, 657, 801, 1059, 3177, 6497, 19491, 25769, 31417, 58473, 77307, 94251, 231921, 282753, 2293441, 6880323, 20640969]

約数ペア:

[(1, 20640969), (3, 6880323), (9, 2293441), (73, 282753), (89, 231921), (219, 94251), (267, 77307), (353, 58473), (657, 31417), (801, 25769), (1059, 19491), (3177, 6497)]