20490955

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1\times {\mathrm{293}}^1$

素因数の和:566

約数の個数: 16

約数和(自身を含む): 25147584

約数和(自身を除く): 4656629

約数列:

[1, 5, 71, 197, 293, 355, 985, 1465, 13987, 20803, 57721, 69935, 104015, 288605, 4098191, 20490955]

約数ペア:

[(1, 20490955), (5, 4098191), (71, 288605), (197, 104015), (293, 69935), (355, 57721), (985, 20803), (1465, 13987)]