21405760

素因数分解:

$2^6\times 5^1\times {\mathrm{151}}^1\times {\mathrm{443}}^1$

素因数の和:611

約数の個数: 56

約数和(自身を含む): 51425856

約数和(自身を除く): 30020096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 151, 160, 302, 320, 443, 604, 755, 886, 1208, 1510, 1772, 2215, 2416, 3020, 3544, 4430, 4832, 6040, 7088, 8860, 9664, 12080, 14176, 17720, 24160, 28352, 35440, 48320, 66893, 70880, 133786, 141760, 267572, 334465, 535144, 668930, 1070288, 1337860, 2140576, 2675720, 4281152, 5351440, 10702880, 21405760]

約数ペア:

[(1, 21405760), (2, 10702880), (4, 5351440), (5, 4281152), (8, 2675720), (10, 2140576), (16, 1337860), (20, 1070288), (32, 668930), (40, 535144), (64, 334465), (80, 267572), (151, 141760), (160, 133786), (302, 70880), (320, 66893), (443, 48320), (604, 35440), (755, 28352), (886, 24160), (1208, 17720), (1510, 14176), (1772, 12080), (2215, 9664), (2416, 8860), (3020, 7088), (3544, 6040), (4430, 4832)]