21709251

素因数分解:

$3^2\times {\mathrm{73}}^1\times {\mathrm{173}}^1\times {\mathrm{191}}^1$

素因数の和:443

約数の個数: 24

約数和(自身を含む): 32138496

約数和(自身を除く): 10429245

約数列:

[1, 3, 9, 73, 173, 191, 219, 519, 573, 657, 1557, 1719, 12629, 13943, 33043, 37887, 41829, 99129, 113661, 125487, 297387, 2412139, 7236417, 21709251]

約数ペア:

[(1, 21709251), (3, 7236417), (9, 2412139), (73, 297387), (173, 125487), (191, 113661), (219, 99129), (519, 41829), (573, 37887), (657, 33043), (1557, 13943), (1719, 12629)]