20391591

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 30792960

約数和(自身を除く): 10401369

約数列:

[1, 3, 11, 33, 53, 89, 131, 159, 267, 393, 583, 979, 1441, 1749, 2937, 4323, 4717, 6943, 11659, 14151, 20829, 34977, 51887, 76373, 128249, 155661, 229119, 384747, 617927, 1853781, 6797197, 20391591]

約数ペア:

[(1, 20391591), (3, 6797197), (11, 1853781), (33, 617927), (53, 384747), (89, 229119), (131, 155661), (159, 128249), (267, 76373), (393, 51887), (583, 34977), (979, 20829), (1441, 14151), (1749, 11659), (2937, 6943), (4323, 4717)]