21301779

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1\times {\mathrm{809}}^1$

素因数の和:1010

約数の個数: 16

約数和(自身を含む): 29082240

約数和(自身を除く): 7780461

約数列:

[1, 3, 67, 131, 201, 393, 809, 2427, 8777, 26331, 54203, 105979, 162609, 317937, 7100593, 21301779]

約数ペア:

[(1, 21301779), (3, 7100593), (67, 317937), (131, 162609), (201, 105979), (393, 54203), (809, 26331), (2427, 8777)]