20391986

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{4909}}^1$

素因数の和:5009

約数の個数: 16

約数和(自身を含む): 32052480

約数和(自身を除く): 11660494

約数列:

[1, 2, 31, 62, 67, 134, 2077, 4154, 4909, 9818, 152179, 304358, 328903, 657806, 10195993, 20391986]

約数ペア:

[(1, 20391986), (2, 10195993), (31, 657806), (62, 328903), (67, 304358), (134, 152179), (2077, 9818), (4154, 4909)]