20459890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{457}}^1$

素因数の和:523

約数の個数: 48

約数和(自身を含む): 41665176

約数和(自身を除く): 21205286

約数列:

[1, 2, 5, 10, 11, 22, 37, 55, 74, 110, 121, 185, 242, 370, 407, 457, 605, 814, 914, 1210, 2035, 2285, 4070, 4477, 4570, 5027, 8954, 10054, 16909, 22385, 25135, 33818, 44770, 50270, 55297, 84545, 110594, 169090, 185999, 276485, 371998, 552970, 929995, 1859990, 2045989, 4091978, 10229945, 20459890]

約数ペア:

[(1, 20459890), (2, 10229945), (5, 4091978), (10, 2045989), (11, 1859990), (22, 929995), (37, 552970), (55, 371998), (74, 276485), (110, 185999), (121, 169090), (185, 110594), (242, 84545), (370, 55297), (407, 50270), (457, 44770), (605, 33818), (814, 25135), (914, 22385), (1210, 16909), (2035, 10054), (2285, 8954), (4070, 5027), (4477, 4570)]