28149880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{63977}}^1$

素因数の和:63999

約数の個数: 32

約数和(自身を含む): 69096240

約数和(自身を除く): 40946360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 63977, 127954, 255908, 319885, 511816, 639770, 703747, 1279540, 1407494, 2559080, 2814988, 3518735, 5629976, 7037470, 14074940, 28149880]

約数ペア:

[(1, 28149880), (2, 14074940), (4, 7037470), (5, 5629976), (8, 3518735), (10, 2814988), (11, 2559080), (20, 1407494), (22, 1279540), (40, 703747), (44, 639770), (55, 511816), (88, 319885), (110, 255908), (220, 127954), (440, 63977)]