1381520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{2467}}^1$

素因数の和:2487

約数の個数: 40

約数和(自身を含む): 3672384

約数和(自身を除く): 2290864

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 2467, 4934, 9868, 12335, 17269, 19736, 24670, 34538, 39472, 49340, 69076, 86345, 98680, 138152, 172690, 197360, 276304, 345380, 690760, 1381520]

約数ペア:

[(1, 1381520), (2, 690760), (4, 345380), (5, 276304), (7, 197360), (8, 172690), (10, 138152), (14, 98680), (16, 86345), (20, 69076), (28, 49340), (35, 39472), (40, 34538), (56, 24670), (70, 19736), (80, 17269), (112, 12335), (140, 9868), (280, 4934), (560, 2467)]