20451440

素因数分解:

$2^4\times 5^1\times {\mathrm{151}}^1\times {\mathrm{1693}}^1$

素因数の和:1857

約数の個数: 40

約数和(自身を含む): 47892768

約数和(自身を除く): 27441328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 151, 302, 604, 755, 1208, 1510, 1693, 2416, 3020, 3386, 6040, 6772, 8465, 12080, 13544, 16930, 27088, 33860, 67720, 135440, 255643, 511286, 1022572, 1278215, 2045144, 2556430, 4090288, 5112860, 10225720, 20451440]

約数ペア:

[(1, 20451440), (2, 10225720), (4, 5112860), (5, 4090288), (8, 2556430), (10, 2045144), (16, 1278215), (20, 1022572), (40, 511286), (80, 255643), (151, 135440), (302, 67720), (604, 33860), (755, 27088), (1208, 16930), (1510, 13544), (1693, 12080), (2416, 8465), (3020, 6772), (3386, 6040)]