81489520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{145517}}^1$

素因数の和:145537

約数の個数: 40

約数和(自身を含む): 216530784

約数和(自身を除く): 135041264

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 145517, 291034, 582068, 727585, 1018619, 1164136, 1455170, 2037238, 2328272, 2910340, 4074476, 5093095, 5820680, 8148952, 10186190, 11641360, 16297904, 20372380, 40744760, 81489520]

約数ペア:

[(1, 81489520), (2, 40744760), (4, 20372380), (5, 16297904), (7, 11641360), (8, 10186190), (10, 8148952), (14, 5820680), (16, 5093095), (20, 4074476), (28, 2910340), (35, 2328272), (40, 2037238), (56, 1455170), (70, 1164136), (80, 1018619), (112, 727585), (140, 582068), (280, 291034), (560, 145517)]