21178901

素因数分解:

${\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1$

素因数の和:344

約数の個数: 16

約数和(自身を含む): 22978560

約数和(自身を除く): 1799659

約数列:

[1, 19, 67, 127, 131, 1273, 2413, 2489, 8509, 8777, 16637, 161671, 166763, 316103, 1114679, 21178901]

約数ペア:

[(1, 21178901), (19, 1114679), (67, 316103), (127, 166763), (131, 161671), (1273, 16637), (2413, 8777), (2489, 8509)]