21691205

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{241}}^1\times {\mathrm{383}}^1$

素因数の和:676

約数の個数: 16

約数和(自身を含む): 26763264

約数和(自身を除く): 5072059

約数列:

[1, 5, 47, 235, 241, 383, 1205, 1915, 11327, 18001, 56635, 90005, 92303, 461515, 4338241, 21691205]

約数ペア:

[(1, 21691205), (5, 4338241), (47, 461515), (235, 92303), (241, 90005), (383, 56635), (1205, 18001), (1915, 11327)]