18904780

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{433}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 41559840

約数和(自身を除く): 22655060

約数列:

[1, 2, 4, 5, 10, 20, 37, 59, 74, 118, 148, 185, 236, 295, 370, 433, 590, 740, 866, 1180, 1732, 2165, 2183, 4330, 4366, 8660, 8732, 10915, 16021, 21830, 25547, 32042, 43660, 51094, 64084, 80105, 102188, 127735, 160210, 255470, 320420, 510940, 945239, 1890478, 3780956, 4726195, 9452390, 18904780]

約数ペア:

[(1, 18904780), (2, 9452390), (4, 4726195), (5, 3780956), (10, 1890478), (20, 945239), (37, 510940), (59, 320420), (74, 255470), (118, 160210), (148, 127735), (185, 102188), (236, 80105), (295, 64084), (370, 51094), (433, 43660), (590, 32042), (740, 25547), (866, 21830), (1180, 16021), (1732, 10915), (2165, 8732), (2183, 8660), (4330, 4366)]