21068817

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{409}}^1$

素因数の和:653

約数の個数: 32

約数和(自身を含む): 35266560

約数和(自身を除く): 14197743

約数列:

[1, 3, 7, 11, 21, 33, 77, 223, 231, 409, 669, 1227, 1561, 2453, 2863, 4499, 4683, 7359, 8589, 13497, 17171, 31493, 51513, 91207, 94479, 273621, 638449, 1003277, 1915347, 3009831, 7022939, 21068817]

約数ペア:

[(1, 21068817), (3, 7022939), (7, 3009831), (11, 1915347), (21, 1003277), (33, 638449), (77, 273621), (223, 94479), (231, 91207), (409, 51513), (669, 31493), (1227, 17171), (1561, 13497), (2453, 8589), (2863, 7359), (4499, 4683)]