21197891

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{271}}^1\times {\mathrm{547}}^1$

素因数の和:842

約数の個数: 16

約数和(自身を含む): 25041408

約数和(自身を除く): 3843517

約数列:

[1, 11, 13, 143, 271, 547, 2981, 3523, 6017, 7111, 38753, 78221, 148237, 1630607, 1927081, 21197891]

約数ペア:

[(1, 21197891), (11, 1927081), (13, 1630607), (143, 148237), (271, 78221), (547, 38753), (2981, 7111), (3523, 6017)]