21407793

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{197}}^1$

素因数の和:337

約数の個数: 32

約数和(自身を含む): 32503680

約数和(自身を除く): 11095887

約数列:

[1, 3, 11, 33, 37, 89, 111, 197, 267, 407, 591, 979, 1221, 2167, 2937, 3293, 6501, 7289, 9879, 17533, 21867, 36223, 52599, 80179, 108669, 192863, 240537, 578589, 648721, 1946163, 7135931, 21407793]

約数ペア:

[(1, 21407793), (3, 7135931), (11, 1946163), (33, 648721), (37, 578589), (89, 240537), (111, 192863), (197, 108669), (267, 80179), (407, 52599), (591, 36223), (979, 21867), (1221, 17533), (2167, 9879), (2937, 7289), (3293, 6501)]