21048500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:162

約数の個数: 96

約数和(自身を含む): 51891840

約数和(自身を除く): 30843340

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 43, 44, 50, 55, 86, 89, 100, 110, 125, 172, 178, 215, 220, 250, 275, 356, 430, 445, 473, 500, 550, 860, 890, 946, 979, 1075, 1100, 1375, 1780, 1892, 1958, 2150, 2225, 2365, 2750, 3827, 3916, 4300, 4450, 4730, 4895, 5375, 5500, 7654, 8900, 9460, 9790, 10750, 11125, 11825, 15308, 19135, 19580, 21500, 22250, 23650, 24475, 38270, 42097, 44500, 47300, 48950, 59125, 76540, 84194, 95675, 97900, 118250, 122375, 168388, 191350, 210485, 236500, 244750, 382700, 420970, 478375, 489500, 841940, 956750, 1052425, 1913500, 2104850, 4209700, 5262125, 10524250, 21048500]

約数ペア:

[(1, 21048500), (2, 10524250), (4, 5262125), (5, 4209700), (10, 2104850), (11, 1913500), (20, 1052425), (22, 956750), (25, 841940), (43, 489500), (44, 478375), (50, 420970), (55, 382700), (86, 244750), (89, 236500), (100, 210485), (110, 191350), (125, 168388), (172, 122375), (178, 118250), (215, 97900), (220, 95675), (250, 84194), (275, 76540), (356, 59125), (430, 48950), (445, 47300), (473, 44500), (500, 42097), (550, 38270), (860, 24475), (890, 23650), (946, 22250), (979, 21500), (1075, 19580), (1100, 19135), (1375, 15308), (1780, 11825), (1892, 11125), (1958, 10750), (2150, 9790), (2225, 9460), (2365, 8900), (2750, 7654), (3827, 5500), (3916, 5375), (4300, 4895), (4450, 4730)]