20505740

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1471}}^1$

素因数の和:1538

約数の個数: 48

約数和(自身を含む): 46738944

約数和(自身を除く): 26233204

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 41, 68, 82, 85, 164, 170, 205, 340, 410, 697, 820, 1394, 1471, 2788, 2942, 3485, 5884, 6970, 7355, 13940, 14710, 25007, 29420, 50014, 60311, 100028, 120622, 125035, 241244, 250070, 301555, 500140, 603110, 1025287, 1206220, 2050574, 4101148, 5126435, 10252870, 20505740]

約数ペア:

[(1, 20505740), (2, 10252870), (4, 5126435), (5, 4101148), (10, 2050574), (17, 1206220), (20, 1025287), (34, 603110), (41, 500140), (68, 301555), (82, 250070), (85, 241244), (164, 125035), (170, 120622), (205, 100028), (340, 60311), (410, 50014), (697, 29420), (820, 25007), (1394, 14710), (1471, 13940), (2788, 7355), (2942, 6970), (3485, 5884)]