1289633660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{66271}}^1$

素因数の和:66426

約数の個数: 48

約数和(自身を含む): 3117434880

約数和(自身を除く): 1827801220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1390, 1946, 2780, 3892, 4865, 9730, 19460, 66271, 132542, 265084, 331355, 463897, 662710, 927794, 1325420, 1855588, 2319485, 4638970, 9211669, 9277940, 18423338, 36846676, 46058345, 64481683, 92116690, 128963366, 184233380, 257926732, 322408415, 644816830, 1289633660]

約数ペア:

[(1, 1289633660), (2, 644816830), (4, 322408415), (5, 257926732), (7, 184233380), (10, 128963366), (14, 92116690), (20, 64481683), (28, 46058345), (35, 36846676), (70, 18423338), (139, 9277940), (140, 9211669), (278, 4638970), (556, 2319485), (695, 1855588), (973, 1325420), (1390, 927794), (1946, 662710), (2780, 463897), (3892, 331355), (4865, 265084), (9730, 132542), (19460, 66271)]