20871921

素因数分解:

$3^1\times 7^1\times {\mathrm{911}}^1\times {\mathrm{1091}}^1$

素因数の和:2012

約数の個数: 16

約数和(自身を含む): 31868928

約数和(自身を除く): 10997007

約数列:

[1, 3, 7, 21, 911, 1091, 2733, 3273, 6377, 7637, 19131, 22911, 993901, 2981703, 6957307, 20871921]

約数ペア:

[(1, 20871921), (3, 6957307), (7, 2981703), (21, 993901), (911, 22911), (1091, 19131), (2733, 7637), (3273, 6377)]