20421863

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{337}}^1\times {\mathrm{787}}^1$

素因数の和:1142

約数の個数: 16

約数和(自身を含む): 25569024

約数和(自身を除く): 5147161

約数列:

[1, 7, 11, 77, 337, 787, 2359, 3707, 5509, 8657, 25949, 60599, 265219, 1856533, 2917409, 20421863]

約数ペア:

[(1, 20421863), (7, 2917409), (11, 1856533), (77, 265219), (337, 60599), (787, 25949), (2359, 8657), (3707, 5509)]