7801220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{541}}^1$

素因数の和:660

約数の個数: 48

約数和(自身を含む): 18939648

約数和(自身を除く): 11138428

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 103, 140, 206, 412, 515, 541, 721, 1030, 1082, 1442, 2060, 2164, 2705, 2884, 3605, 3787, 5410, 7210, 7574, 10820, 14420, 15148, 18935, 37870, 55723, 75740, 111446, 222892, 278615, 390061, 557230, 780122, 1114460, 1560244, 1950305, 3900610, 7801220]

約数ペア:

[(1, 7801220), (2, 3900610), (4, 1950305), (5, 1560244), (7, 1114460), (10, 780122), (14, 557230), (20, 390061), (28, 278615), (35, 222892), (70, 111446), (103, 75740), (140, 55723), (206, 37870), (412, 18935), (515, 15148), (541, 14420), (721, 10820), (1030, 7574), (1082, 7210), (1442, 5410), (2060, 3787), (2164, 3605), (2705, 2884)]