1999203760

素因数分解:

$2^4\times 5^1\times {\mathrm{151}}^1\times {\mathrm{167}}^1\times {\mathrm{991}}^1$

素因数の和:1322

約数の個数: 80

約数和(自身を含む): 4711698432

約数和(自身を除く): 2712494672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 151, 167, 302, 334, 604, 668, 755, 835, 991, 1208, 1336, 1510, 1670, 1982, 2416, 2672, 3020, 3340, 3964, 4955, 6040, 6680, 7928, 9910, 12080, 13360, 15856, 19820, 25217, 39640, 50434, 79280, 100868, 126085, 149641, 165497, 201736, 252170, 299282, 330994, 403472, 504340, 598564, 661988, 748205, 827485, 1008680, 1197128, 1323976, 1496410, 1654970, 2017360, 2394256, 2647952, 2992820, 3309940, 5985640, 6619880, 11971280, 13239760, 24990047, 49980094, 99960188, 124950235, 199920376, 249900470, 399840752, 499800940, 999601880, 1999203760]

約数ペア:

[(1, 1999203760), (2, 999601880), (4, 499800940), (5, 399840752), (8, 249900470), (10, 199920376), (16, 124950235), (20, 99960188), (40, 49980094), (80, 24990047), (151, 13239760), (167, 11971280), (302, 6619880), (334, 5985640), (604, 3309940), (668, 2992820), (755, 2647952), (835, 2394256), (991, 2017360), (1208, 1654970), (1336, 1496410), (1510, 1323976), (1670, 1197128), (1982, 1008680), (2416, 827485), (2672, 748205), (3020, 661988), (3340, 598564), (3964, 504340), (4955, 403472), (6040, 330994), (6680, 299282), (7928, 252170), (9910, 201736), (12080, 165497), (13360, 149641), (15856, 126085), (19820, 100868), (25217, 79280), (39640, 50434)]