20690175

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{809}}^1$

素因数の和:864

約数の個数: 48

約数和(自身を含む): 38568960

約数和(自身を除く): 17878785

約数列:

[1, 3, 5, 11, 15, 25, 31, 33, 55, 75, 93, 155, 165, 275, 341, 465, 775, 809, 825, 1023, 1705, 2325, 2427, 4045, 5115, 8525, 8899, 12135, 20225, 25079, 25575, 26697, 44495, 60675, 75237, 125395, 133485, 222475, 275869, 376185, 626975, 667425, 827607, 1379345, 1880925, 4138035, 6896725, 20690175]

約数ペア:

[(1, 20690175), (3, 6896725), (5, 4138035), (11, 1880925), (15, 1379345), (25, 827607), (31, 667425), (33, 626975), (55, 376185), (75, 275869), (93, 222475), (155, 133485), (165, 125395), (275, 75237), (341, 60675), (465, 44495), (775, 26697), (809, 25575), (825, 25079), (1023, 20225), (1705, 12135), (2325, 8899), (2427, 8525), (4045, 5115)]