989780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{409}}^1$

素因数の和:440

約数の個数: 36

約数和(自身を含む): 2290260

約数和(自身を除く): 1300480

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 409, 484, 605, 818, 1210, 1636, 2045, 2420, 4090, 4499, 8180, 8998, 17996, 22495, 44990, 49489, 89980, 98978, 197956, 247445, 494890, 989780]

約数ペア:

[(1, 989780), (2, 494890), (4, 247445), (5, 197956), (10, 98978), (11, 89980), (20, 49489), (22, 44990), (44, 22495), (55, 17996), (110, 8998), (121, 8180), (220, 4499), (242, 4090), (409, 2420), (484, 2045), (605, 1636), (818, 1210)]