20996949520

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6401509}}^1$

素因数の和:6401563

約数の個数: 40

約数和(自身を含む): 50008596120

約数和(自身を除く): 29011646600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6401509, 12803018, 25606036, 32007545, 51212072, 64015090, 102424144, 128030180, 256060360, 262461869, 512120720, 524923738, 1049847476, 1312309345, 2099694952, 2624618690, 4199389904, 5249237380, 10498474760, 20996949520]

約数ペア:

[(1, 20996949520), (2, 10498474760), (4, 5249237380), (5, 4199389904), (8, 2624618690), (10, 2099694952), (16, 1312309345), (20, 1049847476), (40, 524923738), (41, 512120720), (80, 262461869), (82, 256060360), (164, 128030180), (205, 102424144), (328, 64015090), (410, 51212072), (656, 32007545), (820, 25606036), (1640, 12803018), (3280, 6401509)]