20817580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{241}}^1\times {\mathrm{617}}^1$

素因数の和:874

約数の個数: 48

約数和(自身を含む): 50250816

約数和(自身を除く): 29433236

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 241, 482, 617, 964, 1205, 1234, 1687, 2410, 2468, 3085, 3374, 4319, 4820, 6170, 6748, 8435, 8638, 12340, 16870, 17276, 21595, 33740, 43190, 86380, 148697, 297394, 594788, 743485, 1040879, 1486970, 2081758, 2973940, 4163516, 5204395, 10408790, 20817580]

約数ペア:

[(1, 20817580), (2, 10408790), (4, 5204395), (5, 4163516), (7, 2973940), (10, 2081758), (14, 1486970), (20, 1040879), (28, 743485), (35, 594788), (70, 297394), (140, 148697), (241, 86380), (482, 43190), (617, 33740), (964, 21595), (1205, 17276), (1234, 16870), (1687, 12340), (2410, 8638), (2468, 8435), (3085, 6748), (3374, 6170), (4319, 4820)]