21038787

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{4337}}^1$

素因数の和:4368

約数の個数: 36

約数和(自身を含む): 38573496

約数和(自身を除く): 17534709

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 99, 147, 231, 441, 539, 693, 1617, 4337, 4851, 13011, 30359, 39033, 47707, 91077, 143121, 212513, 273231, 333949, 429363, 637539, 1001847, 1912617, 2337643, 3005541, 7012929, 21038787]

約数ペア:

[(1, 21038787), (3, 7012929), (7, 3005541), (9, 2337643), (11, 1912617), (21, 1001847), (33, 637539), (49, 429363), (63, 333949), (77, 273231), (99, 212513), (147, 143121), (231, 91077), (441, 47707), (539, 39033), (693, 30359), (1617, 13011), (4337, 4851)]