21291258267

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{11106551}}^1$

素因数の和:11106631

約数の個数: 16

約数和(自身を含む): 31986869760

約数和(自身を除く): 10695611493

約数列:

[1, 3, 9, 27, 71, 213, 639, 1917, 11106551, 33319653, 99958959, 299876877, 788565121, 2365695363, 7097086089, 21291258267]

約数ペア:

[(1, 21291258267), (3, 7097086089), (9, 2365695363), (27, 788565121), (71, 299876877), (213, 99958959), (639, 33319653), (1917, 11106551)]