81615385

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{383}}^1$

素因数の和:537

約数の個数: 32

約数和(自身を含む): 109486080

約数和(自身を除く): 27870695

約数列:

[1, 5, 17, 23, 85, 109, 115, 383, 391, 545, 1853, 1915, 1955, 2507, 6511, 8809, 9265, 12535, 32555, 41747, 42619, 44045, 149753, 208735, 213095, 709699, 748765, 960181, 3548495, 4800905, 16323077, 81615385]

約数ペア:

[(1, 81615385), (5, 16323077), (17, 4800905), (23, 3548495), (85, 960181), (109, 748765), (115, 709699), (383, 213095), (391, 208735), (545, 149753), (1853, 44045), (1915, 42619), (1955, 41747), (2507, 32555), (6511, 12535), (8809, 9265)]