81021941

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{373}}^1$

素因数の和:442

約数の個数: 48

約数和(自身を含む): 114605568

約数和(自身を除く): 33583627

約数列:

[1, 7, 11, 13, 31, 49, 77, 91, 143, 217, 341, 373, 403, 539, 637, 1001, 1519, 2387, 2611, 2821, 4103, 4433, 4849, 7007, 11563, 16709, 18277, 19747, 28721, 31031, 33943, 53339, 80941, 127193, 150319, 201047, 217217, 237601, 373373, 566587, 890351, 1052233, 1653509, 2613611, 6232457, 7365631, 11574563, 81021941]

約数ペア:

[(1, 81021941), (7, 11574563), (11, 7365631), (13, 6232457), (31, 2613611), (49, 1653509), (77, 1052233), (91, 890351), (143, 566587), (217, 373373), (341, 237601), (373, 217217), (403, 201047), (539, 150319), (637, 127193), (1001, 80941), (1519, 53339), (2387, 33943), (2611, 31031), (2821, 28721), (4103, 19747), (4433, 18277), (4849, 16709), (7007, 11563)]