31405880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{521}}^1$

素因数の和:680

約数の個数: 64

約数和(自身を含む): 77798880

約数和(自身を除く): 46393000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 137, 220, 274, 440, 521, 548, 685, 1042, 1096, 1370, 1507, 2084, 2605, 2740, 3014, 4168, 5210, 5480, 5731, 6028, 7535, 10420, 11462, 12056, 15070, 20840, 22924, 28655, 30140, 45848, 57310, 60280, 71377, 114620, 142754, 229240, 285508, 356885, 571016, 713770, 785147, 1427540, 1570294, 2855080, 3140588, 3925735, 6281176, 7851470, 15702940, 31405880]

約数ペア:

[(1, 31405880), (2, 15702940), (4, 7851470), (5, 6281176), (8, 3925735), (10, 3140588), (11, 2855080), (20, 1570294), (22, 1427540), (40, 785147), (44, 713770), (55, 571016), (88, 356885), (110, 285508), (137, 229240), (220, 142754), (274, 114620), (440, 71377), (521, 60280), (548, 57310), (685, 45848), (1042, 30140), (1096, 28655), (1370, 22924), (1507, 20840), (2084, 15070), (2605, 12056), (2740, 11462), (3014, 10420), (4168, 7535), (5210, 6028), (5480, 5731)]