21178651

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{1571}}^1$

素因数の和:1662

約数の個数: 16

約数和(自身を含む): 24560928

約数和(自身を除く): 3382277

約数列:

[1, 13, 17, 61, 221, 793, 1037, 1571, 13481, 20423, 26707, 95831, 347191, 1245803, 1629127, 21178651]

約数ペア:

[(1, 21178651), (13, 1629127), (17, 1245803), (61, 347191), (221, 95831), (793, 26707), (1037, 20423), (1571, 13481)]