81373040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{439}}^1$

素因数の和:790

約数の個数: 80

約数和(自身を含む): 217367040

約数和(自身を除く): 135994000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 331, 439, 560, 662, 878, 1324, 1655, 1756, 2195, 2317, 2648, 3073, 3310, 3512, 4390, 4634, 5296, 6146, 6620, 7024, 8780, 9268, 11585, 12292, 13240, 15365, 17560, 18536, 23170, 24584, 26480, 30730, 35120, 37072, 46340, 49168, 61460, 92680, 122920, 145309, 185360, 245840, 290618, 581236, 726545, 1017163, 1162472, 1453090, 2034326, 2324944, 2906180, 4068652, 5085815, 5812360, 8137304, 10171630, 11624720, 16274608, 20343260, 40686520, 81373040]

約数ペア:

[(1, 81373040), (2, 40686520), (4, 20343260), (5, 16274608), (7, 11624720), (8, 10171630), (10, 8137304), (14, 5812360), (16, 5085815), (20, 4068652), (28, 2906180), (35, 2324944), (40, 2034326), (56, 1453090), (70, 1162472), (80, 1017163), (112, 726545), (140, 581236), (280, 290618), (331, 245840), (439, 185360), (560, 145309), (662, 122920), (878, 92680), (1324, 61460), (1655, 49168), (1756, 46340), (2195, 37072), (2317, 35120), (2648, 30730), (3073, 26480), (3310, 24584), (3512, 23170), (4390, 18536), (4634, 17560), (5296, 15365), (6146, 13240), (6620, 12292), (7024, 11585), (8780, 9268)]