128786440

素因数分解:

$2^3\times 5^1\times {\mathrm{269}}^1\times {\mathrm{11969}}^1$

素因数の和:12249

約数の個数: 32

約数和(自身を含む): 290871000

約数和(自身を除く): 162084560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 269, 538, 1076, 1345, 2152, 2690, 5380, 10760, 11969, 23938, 47876, 59845, 95752, 119690, 239380, 478760, 3219661, 6439322, 12878644, 16098305, 25757288, 32196610, 64393220, 128786440]

約数ペア:

[(1, 128786440), (2, 64393220), (4, 32196610), (5, 25757288), (8, 16098305), (10, 12878644), (20, 6439322), (40, 3219661), (269, 478760), (538, 239380), (1076, 119690), (1345, 95752), (2152, 59845), (2690, 47876), (5380, 23938), (10760, 11969)]