21276909

素因数分解:

$3^2\times {\mathrm{23}}^2\times {\mathrm{41}}^1\times {\mathrm{109}}^1$

素因数の和:202

約数の個数: 36

約数和(自身を含む): 33213180

約数和(自身を除く): 11936271

約数列:

[1, 3, 9, 23, 41, 69, 109, 123, 207, 327, 369, 529, 943, 981, 1587, 2507, 2829, 4469, 4761, 7521, 8487, 13407, 21689, 22563, 40221, 57661, 65067, 102787, 172983, 195201, 308361, 518949, 925083, 2364101, 7092303, 21276909]

約数ペア:

[(1, 21276909), (3, 7092303), (9, 2364101), (23, 925083), (41, 518949), (69, 308361), (109, 195201), (123, 172983), (207, 102787), (327, 65067), (369, 57661), (529, 40221), (943, 22563), (981, 21689), (1587, 13407), (2507, 8487), (2829, 7521), (4469, 4761)]