7921980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{4001}}^1$

素因数の和:4027

約数の個数: 72

約数和(自身を含む): 26221104

約数和(自身を除く): 18299124

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 4001, 8002, 12003, 16004, 20005, 24006, 36009, 40010, 44011, 48012, 60015, 72018, 80020, 88022, 120030, 132033, 144036, 176044, 180045, 220055, 240060, 264066, 360090, 396099, 440110, 528132, 660165, 720180, 792198, 880220, 1320330, 1584396, 1980495, 2640660, 3960990, 7921980]

約数ペア:

[(1, 7921980), (2, 3960990), (3, 2640660), (4, 1980495), (5, 1584396), (6, 1320330), (9, 880220), (10, 792198), (11, 720180), (12, 660165), (15, 528132), (18, 440110), (20, 396099), (22, 360090), (30, 264066), (33, 240060), (36, 220055), (44, 180045), (45, 176044), (55, 144036), (60, 132033), (66, 120030), (90, 88022), (99, 80020), (110, 72018), (132, 60015), (165, 48012), (180, 44011), (198, 40010), (220, 36009), (330, 24006), (396, 20005), (495, 16004), (660, 12003), (990, 8002), (1980, 4001)]