20212521

素因数分解:

$3^1\times 7^1\times {\mathrm{787}}^1\times {\mathrm{1223}}^1$

素因数の和:2020

約数の個数: 16

約数和(自身を含む): 30864384

約数和(自身を除く): 10651863

約数列:

[1, 3, 7, 21, 787, 1223, 2361, 3669, 5509, 8561, 16527, 25683, 962501, 2887503, 6737507, 20212521]

約数ペア:

[(1, 20212521), (3, 6737507), (7, 2887503), (21, 962501), (787, 25683), (1223, 16527), (2361, 8561), (3669, 5509)]