19882940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{12911}}^1$

素因数の和:12938

約数の個数: 48

約数和(自身を含む): 52061184

約数和(自身を除く): 32178244

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 12911, 25822, 51644, 64555, 90377, 129110, 142021, 180754, 258220, 284042, 361508, 451885, 568084, 710105, 903770, 994147, 1420210, 1807540, 1988294, 2840420, 3976588, 4970735, 9941470, 19882940]

約数ペア:

[(1, 19882940), (2, 9941470), (4, 4970735), (5, 3976588), (7, 2840420), (10, 1988294), (11, 1807540), (14, 1420210), (20, 994147), (22, 903770), (28, 710105), (35, 568084), (44, 451885), (55, 361508), (70, 284042), (77, 258220), (110, 180754), (140, 142021), (154, 129110), (220, 90377), (308, 64555), (385, 51644), (770, 25822), (1540, 12911)]