20681185

素因数分解:

$5^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{389}}^1$

素因数の和:446

約数の個数: 32

約数和(自身を含む): 29952000

約数和(自身を除く): 9270815

約数列:

[1, 5, 7, 31, 35, 49, 155, 217, 245, 343, 389, 1085, 1519, 1715, 1945, 2723, 7595, 10633, 12059, 13615, 19061, 53165, 60295, 84413, 95305, 133427, 422065, 590891, 667135, 2954455, 4136237, 20681185]

約数ペア:

[(1, 20681185), (5, 4136237), (7, 2954455), (31, 667135), (35, 590891), (49, 422065), (155, 133427), (217, 95305), (245, 84413), (343, 60295), (389, 53165), (1085, 19061), (1519, 13615), (1715, 12059), (1945, 10633), (2723, 7595)]