8542940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{439}}^1$

素因数の和:594

約数の個数: 48

約数和(自身を含む): 20697600

約数和(自身を除く): 12154660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 439, 556, 695, 878, 973, 1390, 1756, 1946, 2195, 2780, 3073, 3892, 4390, 4865, 6146, 8780, 9730, 12292, 15365, 19460, 30730, 61021, 61460, 122042, 244084, 305105, 427147, 610210, 854294, 1220420, 1708588, 2135735, 4271470, 8542940]

約数ペア:

[(1, 8542940), (2, 4271470), (4, 2135735), (5, 1708588), (7, 1220420), (10, 854294), (14, 610210), (20, 427147), (28, 305105), (35, 244084), (70, 122042), (139, 61460), (140, 61021), (278, 30730), (439, 19460), (556, 15365), (695, 12292), (878, 9730), (973, 8780), (1390, 6146), (1756, 4865), (1946, 4390), (2195, 3892), (2780, 3073)]