20181520

素因数分解:

$2^4\times 5^1\times {\mathrm{347}}^1\times {\mathrm{727}}^1$

素因数の和:1087

約数の個数: 40

約数和(自身を含む): 47121984

約数和(自身を除く): 26940464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 347, 694, 727, 1388, 1454, 1735, 2776, 2908, 3470, 3635, 5552, 5816, 6940, 7270, 11632, 13880, 14540, 27760, 29080, 58160, 252269, 504538, 1009076, 1261345, 2018152, 2522690, 4036304, 5045380, 10090760, 20181520]

約数ペア:

[(1, 20181520), (2, 10090760), (4, 5045380), (5, 4036304), (8, 2522690), (10, 2018152), (16, 1261345), (20, 1009076), (40, 504538), (80, 252269), (347, 58160), (694, 29080), (727, 27760), (1388, 14540), (1454, 13880), (1735, 11632), (2776, 7270), (2908, 6940), (3470, 5816), (3635, 5552)]