649863

素因数分解:

$3^4\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:196

約数の個数: 20

約数和(自身を含む): 993168

約数和(自身を除く): 343305

約数列:

[1, 3, 9, 27, 71, 81, 113, 213, 339, 639, 1017, 1917, 3051, 5751, 8023, 9153, 24069, 72207, 216621, 649863]

約数ペア:

[(1, 649863), (3, 216621), (9, 72207), (27, 24069), (71, 9153), (81, 8023), (113, 5751), (213, 3051), (339, 1917), (639, 1017)]