21352185

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 38683008

約数和(自身を除く): 17330823

約数列:

[1, 3, 5, 9, 15, 41, 45, 71, 123, 163, 205, 213, 355, 369, 489, 615, 639, 815, 1065, 1467, 1845, 2445, 2911, 3195, 6683, 7335, 8733, 11573, 14555, 20049, 26199, 33415, 34719, 43665, 57865, 60147, 100245, 104157, 130995, 173595, 300735, 474493, 520785, 1423479, 2372465, 4270437, 7117395, 21352185]

約数ペア:

[(1, 21352185), (3, 7117395), (5, 4270437), (9, 2372465), (15, 1423479), (41, 520785), (45, 474493), (71, 300735), (123, 173595), (163, 130995), (205, 104157), (213, 100245), (355, 60147), (369, 57865), (489, 43665), (615, 34719), (639, 33415), (815, 26199), (1065, 20049), (1467, 14555), (1845, 11573), (2445, 8733), (2911, 7335), (3195, 6683)]