21144620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{1697}}^1$

素因数の和:1802

約数の個数: 48

約数和(自身を含む): 51347520

約数和(自身を除く): 30202900

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 89, 140, 178, 356, 445, 623, 890, 1246, 1697, 1780, 2492, 3115, 3394, 6230, 6788, 8485, 11879, 12460, 16970, 23758, 33940, 47516, 59395, 118790, 151033, 237580, 302066, 604132, 755165, 1057231, 1510330, 2114462, 3020660, 4228924, 5286155, 10572310, 21144620]

約数ペア:

[(1, 21144620), (2, 10572310), (4, 5286155), (5, 4228924), (7, 3020660), (10, 2114462), (14, 1510330), (20, 1057231), (28, 755165), (35, 604132), (70, 302066), (89, 237580), (140, 151033), (178, 118790), (356, 59395), (445, 47516), (623, 33940), (890, 23758), (1246, 16970), (1697, 12460), (1780, 11879), (2492, 8485), (3115, 6788), (3394, 6230)]