20765385

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{163}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 38376000

約数和(自身を除く): 17610615

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 149, 163, 171, 285, 447, 489, 745, 815, 855, 1341, 1467, 2235, 2445, 2831, 3097, 6705, 7335, 8493, 9291, 14155, 15485, 24287, 25479, 27873, 42465, 46455, 72861, 121435, 127395, 139365, 218583, 364305, 461453, 1092915, 1384359, 2307265, 4153077, 6921795, 20765385]

約数ペア:

[(1, 20765385), (3, 6921795), (5, 4153077), (9, 2307265), (15, 1384359), (19, 1092915), (45, 461453), (57, 364305), (95, 218583), (149, 139365), (163, 127395), (171, 121435), (285, 72861), (447, 46455), (489, 42465), (745, 27873), (815, 25479), (855, 24287), (1341, 15485), (1467, 14155), (2235, 9291), (2445, 8493), (2831, 7335), (3097, 6705)]