20931141

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{251}}^1$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 36868608

約数和(自身を除く): 15937467

約数列:

[1, 3, 7, 11, 19, 21, 33, 57, 77, 133, 209, 231, 251, 361, 399, 627, 753, 1083, 1463, 1757, 2527, 2761, 3971, 4389, 4769, 5271, 7581, 8283, 11913, 14307, 19327, 27797, 33383, 52459, 57981, 83391, 90611, 100149, 157377, 271833, 367213, 634277, 996721, 1101639, 1902831, 2990163, 6977047, 20931141]

約数ペア:

[(1, 20931141), (3, 6977047), (7, 2990163), (11, 1902831), (19, 1101639), (21, 996721), (33, 634277), (57, 367213), (77, 271833), (133, 157377), (209, 100149), (231, 90611), (251, 83391), (361, 57981), (399, 52459), (627, 33383), (753, 27797), (1083, 19327), (1463, 14307), (1757, 11913), (2527, 8283), (2761, 7581), (3971, 5271), (4389, 4769)]