21000279760

素因数分解:

$2^4\times 5^1\times {\mathrm{1223}}^1\times {\mathrm{214639}}^1$

素因数の和:215875

約数の個数: 40

約数和(自身を含む): 48865800960

約数和(自身を除く): 27865521200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1223, 2446, 4892, 6115, 9784, 12230, 19568, 24460, 48920, 97840, 214639, 429278, 858556, 1073195, 1717112, 2146390, 3434224, 4292780, 8585560, 17171120, 262503497, 525006994, 1050013988, 1312517485, 2100027976, 2625034970, 4200055952, 5250069940, 10500139880, 21000279760]

約数ペア:

[(1, 21000279760), (2, 10500139880), (4, 5250069940), (5, 4200055952), (8, 2625034970), (10, 2100027976), (16, 1312517485), (20, 1050013988), (40, 525006994), (80, 262503497), (1223, 17171120), (2446, 8585560), (4892, 4292780), (6115, 3434224), (9784, 2146390), (12230, 1717112), (19568, 1073195), (24460, 858556), (48920, 429278), (97840, 214639)]