2121140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 5174400

約数和(自身を除く): 3053260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 139, 140, 218, 278, 436, 545, 556, 695, 763, 973, 1090, 1390, 1526, 1946, 2180, 2780, 3052, 3815, 3892, 4865, 7630, 9730, 15151, 15260, 19460, 30302, 60604, 75755, 106057, 151510, 212114, 303020, 424228, 530285, 1060570, 2121140]

約数ペア:

[(1, 2121140), (2, 1060570), (4, 530285), (5, 424228), (7, 303020), (10, 212114), (14, 151510), (20, 106057), (28, 75755), (35, 60604), (70, 30302), (109, 19460), (139, 15260), (140, 15151), (218, 9730), (278, 7630), (436, 4865), (545, 3892), (556, 3815), (695, 3052), (763, 2780), (973, 2180), (1090, 1946), (1390, 1526)]