18988945

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{211}}^1\times {\mathrm{439}}^1$

素因数の和:696

約数の個数: 16

約数和(自身を含む): 23506560

約数和(自身を除く): 4517615

約数列:

[1, 5, 41, 205, 211, 439, 1055, 2195, 8651, 17999, 43255, 89995, 92629, 463145, 3797789, 18988945]

約数ペア:

[(1, 18988945), (5, 3797789), (41, 463145), (205, 92629), (211, 89995), (439, 43255), (1055, 17999), (2195, 8651)]