21315814

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{641}}^1\times {\mathrm{1279}}^1$

素因数の和:1935

約数の個数: 16

約数和(自身を含む): 34513920

約数和(自身を除く): 13198106

約数列:

[1, 2, 13, 26, 641, 1279, 1282, 2558, 8333, 16627, 16666, 33254, 819839, 1639678, 10657907, 21315814]

約数ペア:

[(1, 21315814), (2, 10657907), (13, 1639678), (26, 819839), (641, 33254), (1279, 16666), (1282, 16627), (2558, 8333)]