21828004

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 43464960

約数和(自身を除く): 21636956

約数列:

[1, 2, 4, 11, 22, 43, 44, 83, 86, 139, 166, 172, 278, 332, 473, 556, 913, 946, 1529, 1826, 1892, 3058, 3569, 3652, 5977, 6116, 7138, 11537, 11954, 14276, 23074, 23908, 39259, 46148, 65747, 78518, 126907, 131494, 157036, 253814, 262988, 496091, 507628, 992182, 1984364, 5457001, 10914002, 21828004]

約数ペア:

[(1, 21828004), (2, 10914002), (4, 5457001), (11, 1984364), (22, 992182), (43, 507628), (44, 496091), (83, 262988), (86, 253814), (139, 157036), (166, 131494), (172, 126907), (278, 78518), (332, 65747), (473, 46148), (556, 39259), (913, 23908), (946, 23074), (1529, 14276), (1826, 11954), (1892, 11537), (3058, 7138), (3569, 6116), (3652, 5977)]