20761580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3617}}^1$

素因数の和:3674

約数の個数: 48

約数和(自身を含む): 51057216

約数和(自身を除く): 30295636

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3617, 5740, 7234, 14468, 18085, 25319, 36170, 50638, 72340, 101276, 126595, 148297, 253190, 296594, 506380, 593188, 741485, 1038079, 1482970, 2076158, 2965940, 4152316, 5190395, 10380790, 20761580]

約数ペア:

[(1, 20761580), (2, 10380790), (4, 5190395), (5, 4152316), (7, 2965940), (10, 2076158), (14, 1482970), (20, 1038079), (28, 741485), (35, 593188), (41, 506380), (70, 296594), (82, 253190), (140, 148297), (164, 126595), (205, 101276), (287, 72340), (410, 50638), (574, 36170), (820, 25319), (1148, 18085), (1435, 14468), (2870, 7234), (3617, 5740)]