1388406520

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{135059}}^1$

素因数の和:135327

約数の個数: 32

約数和(自身を含む): 3136093200

約数和(自身を除く): 1747686680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2570, 5140, 10280, 135059, 270118, 540236, 675295, 1080472, 1350590, 2701180, 5402360, 34710163, 69420326, 138840652, 173550815, 277681304, 347101630, 694203260, 1388406520]

約数ペア:

[(1, 1388406520), (2, 694203260), (4, 347101630), (5, 277681304), (8, 173550815), (10, 138840652), (20, 69420326), (40, 34710163), (257, 5402360), (514, 2701180), (1028, 1350590), (1285, 1080472), (2056, 675295), (2570, 540236), (5140, 270118), (10280, 135059)]