20312649

素因数分解:

$3^2\times 7^1\times {\mathrm{503}}^1\times {\mathrm{641}}^1$

素因数の和:1157

約数の個数: 24

約数和(自身を含む): 33651072

約数和(自身を除く): 13338423

約数列:

[1, 3, 7, 9, 21, 63, 503, 641, 1509, 1923, 3521, 4487, 4527, 5769, 10563, 13461, 31689, 40383, 322423, 967269, 2256961, 2901807, 6770883, 20312649]

約数ペア:

[(1, 20312649), (3, 6770883), (7, 2901807), (9, 2256961), (21, 967269), (63, 322423), (503, 40383), (641, 31689), (1509, 13461), (1923, 10563), (3521, 5769), (4487, 4527)]