17790820

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{151}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 38763648

約数和(自身を除く): 20972828

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 137, 151, 172, 215, 274, 302, 430, 548, 604, 685, 755, 860, 1370, 1510, 2740, 3020, 5891, 6493, 11782, 12986, 20687, 23564, 25972, 29455, 32465, 41374, 58910, 64930, 82748, 103435, 117820, 129860, 206870, 413740, 889541, 1779082, 3558164, 4447705, 8895410, 17790820]

約数ペア:

[(1, 17790820), (2, 8895410), (4, 4447705), (5, 3558164), (10, 1779082), (20, 889541), (43, 413740), (86, 206870), (137, 129860), (151, 117820), (172, 103435), (215, 82748), (274, 64930), (302, 58910), (430, 41374), (548, 32465), (604, 29455), (685, 25972), (755, 23564), (860, 20687), (1370, 12986), (1510, 11782), (2740, 6493), (3020, 5891)]