20387031

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{211}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 32237568

約数和(自身を除く): 11850537

約数列:

[1, 3, 7, 21, 43, 107, 129, 211, 301, 321, 633, 749, 903, 1477, 2247, 4431, 4601, 9073, 13803, 22577, 27219, 32207, 63511, 67731, 96621, 158039, 190533, 474117, 970811, 2912433, 6795677, 20387031]

約数ペア:

[(1, 20387031), (3, 6795677), (7, 2912433), (21, 970811), (43, 474117), (107, 190533), (129, 158039), (211, 96621), (301, 67731), (321, 63511), (633, 32207), (749, 27219), (903, 22577), (1477, 13803), (2247, 9073), (4431, 4601)]