278843877

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:500

約数の個数: 80

約数和(自身を含む): 488969712

約数和(自身を除く): 210125835

約数列:

[1, 3, 9, 13, 17, 27, 37, 39, 51, 81, 111, 117, 153, 221, 333, 351, 421, 459, 481, 629, 663, 999, 1053, 1263, 1377, 1443, 1887, 1989, 2997, 3789, 4329, 5473, 5661, 5967, 7157, 8177, 11367, 12987, 15577, 16419, 16983, 17901, 21471, 24531, 34101, 38961, 46731, 49257, 50949, 64413, 73593, 93041, 140193, 147771, 193239, 202501, 220779, 264809, 279123, 420579, 443313, 579717, 607503, 662337, 794427, 837369, 1261737, 1822509, 2383281, 2512107, 3442517, 5467527, 7149843, 7536321, 10327551, 16402581, 21449529, 30982653, 92947959, 278843877]

約数ペア:

[(1, 278843877), (3, 92947959), (9, 30982653), (13, 21449529), (17, 16402581), (27, 10327551), (37, 7536321), (39, 7149843), (51, 5467527), (81, 3442517), (111, 2512107), (117, 2383281), (153, 1822509), (221, 1261737), (333, 837369), (351, 794427), (421, 662337), (459, 607503), (481, 579717), (629, 443313), (663, 420579), (999, 279123), (1053, 264809), (1263, 220779), (1377, 202501), (1443, 193239), (1887, 147771), (1989, 140193), (2997, 93041), (3789, 73593), (4329, 64413), (5473, 50949), (5661, 49257), (5967, 46731), (7157, 38961), (8177, 34101), (11367, 24531), (12987, 21471), (15577, 17901), (16419, 16983)]