21294567

素因数分解:

$3^2\times 7^2\times {\mathrm{109}}^1\times {\mathrm{443}}^1$

素因数の和:572

約数の個数: 36

約数和(自身を含む): 36190440

約数和(自身を除く): 14895873

約数列:

[1, 3, 7, 9, 21, 49, 63, 109, 147, 327, 441, 443, 763, 981, 1329, 2289, 3101, 3987, 5341, 6867, 9303, 16023, 21707, 27909, 48069, 48287, 65121, 144861, 195363, 338009, 434583, 1014027, 2366063, 3042081, 7098189, 21294567]

約数ペア:

[(1, 21294567), (3, 7098189), (7, 3042081), (9, 2366063), (21, 1014027), (49, 434583), (63, 338009), (109, 195363), (147, 144861), (327, 65121), (441, 48287), (443, 48069), (763, 27909), (981, 21707), (1329, 16023), (2289, 9303), (3101, 6867), (3987, 5341)]