20561915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{2161}}^1$

素因数の和:2350

約数の個数: 16

約数和(自身を含む): 27085536

約数和(自身を除く): 6523621

約数列:

[1, 5, 11, 55, 173, 865, 1903, 2161, 9515, 10805, 23771, 118855, 373853, 1869265, 4112383, 20561915]

約数ペア:

[(1, 20561915), (5, 4112383), (11, 1869265), (55, 373853), (173, 118855), (865, 23771), (1903, 10805), (2161, 9515)]