21439165

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{251}}^1\times {\mathrm{1553}}^1$

素因数の和:1820

約数の個数: 16

約数和(自身を含む): 28195776

約数和(自身を除く): 6756611

約数列:

[1, 5, 11, 55, 251, 1255, 1553, 2761, 7765, 13805, 17083, 85415, 389803, 1949015, 4287833, 21439165]

約数ペア:

[(1, 21439165), (5, 4287833), (11, 1949015), (55, 389803), (251, 85415), (1255, 17083), (1553, 13805), (2761, 7765)]