19897240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4111}}^1$

素因数の和:4144

約数の個数: 48

約数和(自身を含む): 49220640

約数和(自身を除く): 29323400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4111, 4840, 8222, 16444, 20555, 32888, 41110, 45221, 82220, 90442, 164440, 180884, 226105, 361768, 452210, 497431, 904420, 994862, 1808840, 1989724, 2487155, 3979448, 4974310, 9948620, 19897240]

約数ペア:

[(1, 19897240), (2, 9948620), (4, 4974310), (5, 3979448), (8, 2487155), (10, 1989724), (11, 1808840), (20, 994862), (22, 904420), (40, 497431), (44, 452210), (55, 361768), (88, 226105), (110, 180884), (121, 164440), (220, 90442), (242, 82220), (440, 45221), (484, 41110), (605, 32888), (968, 20555), (1210, 16444), (2420, 8222), (4111, 4840)]