19810831

素因数分解:

${\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{661}}^1$

素因数の和:762

約数の個数: 16

約数和(自身を含む): 22020768

約数和(自身を除く): 2209937

約数列:

[1, 17, 41, 43, 661, 697, 731, 1763, 11237, 27101, 28423, 29971, 460717, 483191, 1165343, 19810831]

約数ペア:

[(1, 19810831), (17, 1165343), (41, 483191), (43, 460717), (661, 29971), (697, 28423), (731, 27101), (1763, 11237)]