66561680

素因数分解:

$2^4\times 5^1\times {\mathrm{353}}^1\times {\mathrm{2357}}^1$

素因数の和:2723

約数の個数: 40

約数和(自身を含む): 155260152

約数和(自身を除く): 88698472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 353, 706, 1412, 1765, 2357, 2824, 3530, 4714, 5648, 7060, 9428, 11785, 14120, 18856, 23570, 28240, 37712, 47140, 94280, 188560, 832021, 1664042, 3328084, 4160105, 6656168, 8320210, 13312336, 16640420, 33280840, 66561680]

約数ペア:

[(1, 66561680), (2, 33280840), (4, 16640420), (5, 13312336), (8, 8320210), (10, 6656168), (16, 4160105), (20, 3328084), (40, 1664042), (80, 832021), (353, 188560), (706, 94280), (1412, 47140), (1765, 37712), (2357, 28240), (2824, 23570), (3530, 18856), (4714, 14120), (5648, 11785), (7060, 9428)]