21780381

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{17579}}^1$

素因数の和:17648

約数の個数: 16

約数和(自身を含む): 33753600

約数和(自身を除く): 11973219

約数列:

[1, 3, 7, 21, 59, 177, 413, 1239, 17579, 52737, 123053, 369159, 1037161, 3111483, 7260127, 21780381]

約数ペア:

[(1, 21780381), (3, 7260127), (7, 3111483), (21, 1037161), (59, 369159), (177, 123053), (413, 52737), (1239, 17579)]