207899780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{85909}}^1$

素因数の和:85940

約数の個数: 36

約数和(自身を含む): 479893260

約数和(自身を除く): 271993480

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 85909, 171818, 343636, 429545, 859090, 944999, 1718180, 1889998, 3779996, 4724995, 9449990, 10394989, 18899980, 20789978, 41579956, 51974945, 103949890, 207899780]

約数ペア:

[(1, 207899780), (2, 103949890), (4, 51974945), (5, 41579956), (10, 20789978), (11, 18899980), (20, 10394989), (22, 9449990), (44, 4724995), (55, 3779996), (110, 1889998), (121, 1718180), (220, 944999), (242, 859090), (484, 429545), (605, 343636), (1210, 171818), (2420, 85909)]