21000887968

素因数分解:

$2^5\times {\mathrm{173}}^1\times {\mathrm{433}}^1\times {\mathrm{8761}}^1$

素因数の和:9377

約数の個数: 48

約数和(自身を含む): 41685285096

約数和(自身を除く): 20684397128

約数列:

[1, 2, 4, 8, 16, 32, 173, 346, 433, 692, 866, 1384, 1732, 2768, 3464, 5536, 6928, 8761, 13856, 17522, 35044, 70088, 74909, 140176, 149818, 280352, 299636, 599272, 1198544, 1515653, 2397088, 3031306, 3793513, 6062612, 7587026, 12125224, 15174052, 24250448, 30348104, 48500896, 60696208, 121392416, 656277749, 1312555498, 2625110996, 5250221992, 10500443984, 21000887968]

約数ペア:

[(1, 21000887968), (2, 10500443984), (4, 5250221992), (8, 2625110996), (16, 1312555498), (32, 656277749), (173, 121392416), (346, 60696208), (433, 48500896), (692, 30348104), (866, 24250448), (1384, 15174052), (1732, 12125224), (2768, 7587026), (3464, 6062612), (5536, 3793513), (6928, 3031306), (8761, 2397088), (13856, 1515653), (17522, 1198544), (35044, 599272), (70088, 299636), (74909, 280352), (140176, 149818)]