21104979

素因数分解:

$3^1\times 7^1\times {\mathrm{787}}^1\times {\mathrm{1277}}^1$

素因数の和:2074

約数の個数: 16

約数和(自身を含む): 32226048

約数和(自身を除く): 11121069

約数列:

[1, 3, 7, 21, 787, 1277, 2361, 3831, 5509, 8939, 16527, 26817, 1004999, 3014997, 7034993, 21104979]

約数ペア:

[(1, 21104979), (3, 7034993), (7, 3014997), (21, 1004999), (787, 26817), (1277, 16527), (2361, 8939), (3831, 5509)]