21054957

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{449}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 36936000

約数和(自身を除く): 15881043

約数列:

[1, 3, 7, 11, 21, 29, 33, 49, 77, 87, 147, 203, 231, 319, 449, 539, 609, 957, 1347, 1421, 1617, 2233, 3143, 4263, 4939, 6699, 9429, 13021, 14817, 15631, 22001, 34573, 39063, 46893, 66003, 91147, 103719, 143231, 242011, 273441, 429693, 638029, 726033, 1002617, 1914087, 3007851, 7018319, 21054957]

約数ペア:

[(1, 21054957), (3, 7018319), (7, 3007851), (11, 1914087), (21, 1002617), (29, 726033), (33, 638029), (49, 429693), (77, 273441), (87, 242011), (147, 143231), (203, 103719), (231, 91147), (319, 66003), (449, 46893), (539, 39063), (609, 34573), (957, 22001), (1347, 15631), (1421, 14817), (1617, 13021), (2233, 9429), (3143, 6699), (4263, 4939)]