21248871

素因数分解:

$3^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{6701}}^1$

素因数の和:6862

約数の個数: 16

約数和(自身を含む): 32598528

約数和(自身を除く): 11349657

約数列:

[1, 3, 7, 21, 151, 453, 1057, 3171, 6701, 20103, 46907, 140721, 1011851, 3035553, 7082957, 21248871]

約数ペア:

[(1, 21248871), (3, 7082957), (7, 3035553), (21, 1011851), (151, 140721), (453, 46907), (1057, 20103), (3171, 6701)]