17566820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 38102400

約数和(自身を除く): 20535580

約数列:

[1, 2, 4, 5, 10, 20, 71, 89, 139, 142, 178, 278, 284, 355, 356, 445, 556, 695, 710, 890, 1390, 1420, 1780, 2780, 6319, 9869, 12371, 12638, 19738, 24742, 25276, 31595, 39476, 49345, 49484, 61855, 63190, 98690, 123710, 126380, 197380, 247420, 878341, 1756682, 3513364, 4391705, 8783410, 17566820]

約数ペア:

[(1, 17566820), (2, 8783410), (4, 4391705), (5, 3513364), (10, 1756682), (20, 878341), (71, 247420), (89, 197380), (139, 126380), (142, 123710), (178, 98690), (278, 63190), (284, 61855), (355, 49484), (356, 49345), (445, 39476), (556, 31595), (695, 25276), (710, 24742), (890, 19738), (1390, 12638), (1420, 12371), (1780, 9869), (2780, 6319)]