19981954

素因数分解:

$2^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{1439}}^1$

素因数の和:1625

約数の個数: 16

約数和(自身を含む): 30792960

約数和(自身を除く): 10811006

約数列:

[1, 2, 53, 106, 131, 262, 1439, 2878, 6943, 13886, 76267, 152534, 188509, 377018, 9990977, 19981954]

約数ペア:

[(1, 19981954), (2, 9990977), (53, 377018), (106, 188509), (131, 152534), (262, 76267), (1439, 13886), (2878, 6943)]