21663369

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2939}}^1$

素因数の和:2971

約数の個数: 40

約数和(自身を含む): 39842880

約数和(自身を除く): 18179511

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 2939, 7371, 8817, 20573, 26451, 38207, 61719, 79353, 114621, 185157, 238059, 267449, 343863, 555471, 802347, 1031589, 1666413, 2407041, 3094767, 7221123, 21663369]

約数ペア:

[(1, 21663369), (3, 7221123), (7, 3094767), (9, 2407041), (13, 1666413), (21, 1031589), (27, 802347), (39, 555471), (63, 343863), (81, 267449), (91, 238059), (117, 185157), (189, 114621), (273, 79353), (351, 61719), (567, 38207), (819, 26451), (1053, 20573), (2457, 8817), (2939, 7371)]