155771740

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1\times {\mathrm{409}}^1$

素因数の和:694

約数の個数: 48

約数和(自身を含む): 332690400

約数和(自身を除く): 176918660

約数列:

[1, 2, 4, 5, 10, 20, 137, 139, 274, 278, 409, 548, 556, 685, 695, 818, 1370, 1390, 1636, 2045, 2740, 2780, 4090, 8180, 19043, 38086, 56033, 56851, 76172, 95215, 112066, 113702, 190430, 224132, 227404, 280165, 284255, 380860, 560330, 568510, 1120660, 1137020, 7788587, 15577174, 31154348, 38942935, 77885870, 155771740]

約数ペア:

[(1, 155771740), (2, 77885870), (4, 38942935), (5, 31154348), (10, 15577174), (20, 7788587), (137, 1137020), (139, 1120660), (274, 568510), (278, 560330), (409, 380860), (548, 284255), (556, 280165), (685, 227404), (695, 224132), (818, 190430), (1370, 113702), (1390, 112066), (1636, 95215), (2045, 76172), (2740, 56851), (2780, 56033), (4090, 38086), (8180, 19043)]