19813955

素因数分解:

$5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{2683}}^1$

素因数の和:2906

約数の個数: 16

約数和(自身を含む): 27312384

約数和(自身を除く): 7498429

約数列:

[1, 5, 7, 35, 211, 1055, 1477, 2683, 7385, 13415, 18781, 93905, 566113, 2830565, 3962791, 19813955]

約数ペア:

[(1, 19813955), (5, 3962791), (7, 2830565), (35, 566113), (211, 93905), (1055, 18781), (1477, 13415), (2683, 7385)]