20407556

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{601}}^1\times {\mathrm{653}}^1$

素因数の和:1271

約数の個数: 24

約数和(自身を含む): 38583384

約数和(自身を除く): 18175828

約数列:

[1, 2, 4, 13, 26, 52, 601, 653, 1202, 1306, 2404, 2612, 7813, 8489, 15626, 16978, 31252, 33956, 392453, 784906, 1569812, 5101889, 10203778, 20407556]

約数ペア:

[(1, 20407556), (2, 10203778), (4, 5101889), (13, 1569812), (26, 784906), (52, 392453), (601, 33956), (653, 31252), (1202, 16978), (1306, 15626), (2404, 8489), (2612, 7813)]