18428620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{947}}^1$

素因数の和:1102

約数の個数: 48

約数和(自身を含む): 44593920

約数和(自身を除く): 26165300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 947, 973, 1390, 1894, 1946, 2780, 3788, 3892, 4735, 4865, 6629, 9470, 9730, 13258, 18940, 19460, 26516, 33145, 66290, 131633, 132580, 263266, 526532, 658165, 921431, 1316330, 1842862, 2632660, 3685724, 4607155, 9214310, 18428620]

約数ペア:

[(1, 18428620), (2, 9214310), (4, 4607155), (5, 3685724), (7, 2632660), (10, 1842862), (14, 1316330), (20, 921431), (28, 658165), (35, 526532), (70, 263266), (139, 132580), (140, 131633), (278, 66290), (556, 33145), (695, 26516), (947, 19460), (973, 18940), (1390, 13258), (1894, 9730), (1946, 9470), (2780, 6629), (3788, 4865), (3892, 4735)]