20399840

素因数分解:

$2^5\times 5^1\times {\mathrm{59}}^1\times {\mathrm{2161}}^1$

素因数の和:2235

約数の個数: 48

約数和(自身を含む): 49034160

約数和(自身を除く): 28634320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 80, 118, 160, 236, 295, 472, 590, 944, 1180, 1888, 2161, 2360, 4322, 4720, 8644, 9440, 10805, 17288, 21610, 34576, 43220, 69152, 86440, 127499, 172880, 254998, 345760, 509996, 637495, 1019992, 1274990, 2039984, 2549980, 4079968, 5099960, 10199920, 20399840]

約数ペア:

[(1, 20399840), (2, 10199920), (4, 5099960), (5, 4079968), (8, 2549980), (10, 2039984), (16, 1274990), (20, 1019992), (32, 637495), (40, 509996), (59, 345760), (80, 254998), (118, 172880), (160, 127499), (236, 86440), (295, 69152), (472, 43220), (590, 34576), (944, 21610), (1180, 17288), (1888, 10805), (2161, 9440), (2360, 8644), (4322, 4720)]