21090867

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{12713}}^1$

素因数の和:12802

約数の個数: 16

約数和(自身を含む): 32547840

約数和(自身を除く): 11456973

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 12713, 38139, 88991, 266973, 1004327, 3012981, 7030289, 21090867]

約数ペア:

[(1, 21090867), (3, 7030289), (7, 3012981), (21, 1004327), (79, 266973), (237, 88991), (553, 38139), (1659, 12713)]