20145440

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{17987}}^1$

素因数の和:18009

約数の個数: 48

約数和(自身を含む): 54395712

約数和(自身を除く): 34250272

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 17987, 35974, 71948, 89935, 125909, 143896, 179870, 251818, 287792, 359740, 503636, 575584, 629545, 719480, 1007272, 1259090, 1438960, 2014544, 2518180, 2877920, 4029088, 5036360, 10072720, 20145440]

約数ペア:

[(1, 20145440), (2, 10072720), (4, 5036360), (5, 4029088), (7, 2877920), (8, 2518180), (10, 2014544), (14, 1438960), (16, 1259090), (20, 1007272), (28, 719480), (32, 629545), (35, 575584), (40, 503636), (56, 359740), (70, 287792), (80, 251818), (112, 179870), (140, 143896), (160, 125909), (224, 89935), (280, 71948), (560, 35974), (1120, 17987)]