21721570

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12853}}^1$

素因数の和:12886

約数の個数: 24

約数和(自身を含む): 42341076

約数和(自身を除く): 20619506

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12853, 25706, 64265, 128530, 167089, 334178, 835445, 1670890, 2172157, 4344314, 10860785, 21721570]

約数ペア:

[(1, 21721570), (2, 10860785), (5, 4344314), (10, 2172157), (13, 1670890), (26, 835445), (65, 334178), (130, 167089), (169, 128530), (338, 64265), (845, 25706), (1690, 12853)]