81748520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{1039}}^1$

素因数の和:1338

約数の個数: 64

約数和(自身を含む): 211161600

約数和(自身を除く): 129413080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 281, 562, 1039, 1124, 1405, 1967, 2078, 2248, 2810, 3934, 4156, 5195, 5620, 7273, 7868, 8312, 9835, 10390, 11240, 14546, 15736, 19670, 20780, 29092, 36365, 39340, 41560, 58184, 72730, 78680, 145460, 290920, 291959, 583918, 1167836, 1459795, 2043713, 2335672, 2919590, 4087426, 5839180, 8174852, 10218565, 11678360, 16349704, 20437130, 40874260, 81748520]

約数ペア:

[(1, 81748520), (2, 40874260), (4, 20437130), (5, 16349704), (7, 11678360), (8, 10218565), (10, 8174852), (14, 5839180), (20, 4087426), (28, 2919590), (35, 2335672), (40, 2043713), (56, 1459795), (70, 1167836), (140, 583918), (280, 291959), (281, 290920), (562, 145460), (1039, 78680), (1124, 72730), (1405, 58184), (1967, 41560), (2078, 39340), (2248, 36365), (2810, 29092), (3934, 20780), (4156, 19670), (5195, 15736), (5620, 14546), (7273, 11240), (7868, 10390), (8312, 9835)]