28005560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{63649}}^1$

素因数の和:63671

約数の個数: 32

約数和(自身を含む): 68742000

約数和(自身を除く): 40736440

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 63649, 127298, 254596, 318245, 509192, 636490, 700139, 1272980, 1400278, 2545960, 2800556, 3500695, 5601112, 7001390, 14002780, 28005560]

約数ペア:

[(1, 28005560), (2, 14002780), (4, 7001390), (5, 5601112), (8, 3500695), (10, 2800556), (11, 2545960), (20, 1400278), (22, 1272980), (40, 700139), (44, 636490), (55, 509192), (88, 318245), (110, 254596), (220, 127298), (440, 63649)]