21071480

素因数分解:

$2^3\times 5^1\times {\mathrm{709}}^1\times {\mathrm{743}}^1$

素因数の和:1463

約数の個数: 32

約数和(自身を含む): 47541600

約数和(自身を除く): 26470120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 709, 743, 1418, 1486, 2836, 2972, 3545, 3715, 5672, 5944, 7090, 7430, 14180, 14860, 28360, 29720, 526787, 1053574, 2107148, 2633935, 4214296, 5267870, 10535740, 21071480]

約数ペア:

[(1, 21071480), (2, 10535740), (4, 5267870), (5, 4214296), (8, 2633935), (10, 2107148), (20, 1053574), (40, 526787), (709, 29720), (743, 28360), (1418, 14860), (1486, 14180), (2836, 7430), (2972, 7090), (3545, 5944), (3715, 5672)]