20515390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{89}}^2$

素因数の和:229

約数の個数: 48

約数和(自身を含む): 43836192

約数和(自身を除く): 23320802

約数列:

[1, 2, 5, 7, 10, 14, 35, 37, 70, 74, 89, 178, 185, 259, 370, 445, 518, 623, 890, 1246, 1295, 2590, 3115, 3293, 6230, 6586, 7921, 15842, 16465, 23051, 32930, 39605, 46102, 55447, 79210, 110894, 115255, 230510, 277235, 293077, 554470, 586154, 1465385, 2051539, 2930770, 4103078, 10257695, 20515390]

約数ペア:

[(1, 20515390), (2, 10257695), (5, 4103078), (7, 2930770), (10, 2051539), (14, 1465385), (35, 586154), (37, 554470), (70, 293077), (74, 277235), (89, 230510), (178, 115255), (185, 110894), (259, 79210), (370, 55447), (445, 46102), (518, 39605), (623, 32930), (890, 23051), (1246, 16465), (1295, 15842), (2590, 7921), (3115, 6586), (3293, 6230)]