209265520

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{479}}^1$

素因数の和:662

約数の個数: 80

約数和(自身を含む): 502824960

約数和(自身を除く): 293559440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 127, 172, 215, 254, 344, 430, 479, 508, 635, 688, 860, 958, 1016, 1270, 1720, 1916, 2032, 2395, 2540, 3440, 3832, 4790, 5080, 5461, 7664, 9580, 10160, 10922, 19160, 20597, 21844, 27305, 38320, 41194, 43688, 54610, 60833, 82388, 87376, 102985, 109220, 121666, 164776, 205970, 218440, 243332, 304165, 329552, 411940, 436880, 486664, 608330, 823880, 973328, 1216660, 1647760, 2433320, 2615819, 4866640, 5231638, 10463276, 13079095, 20926552, 26158190, 41853104, 52316380, 104632760, 209265520]

約数ペア:

[(1, 209265520), (2, 104632760), (4, 52316380), (5, 41853104), (8, 26158190), (10, 20926552), (16, 13079095), (20, 10463276), (40, 5231638), (43, 4866640), (80, 2615819), (86, 2433320), (127, 1647760), (172, 1216660), (215, 973328), (254, 823880), (344, 608330), (430, 486664), (479, 436880), (508, 411940), (635, 329552), (688, 304165), (860, 243332), (958, 218440), (1016, 205970), (1270, 164776), (1720, 121666), (1916, 109220), (2032, 102985), (2395, 87376), (2540, 82388), (3440, 60833), (3832, 54610), (4790, 43688), (5080, 41194), (5461, 38320), (7664, 27305), (9580, 21844), (10160, 20597), (10922, 19160)]