21002745

素因数分解:

$3^1\times 5^1\times {\mathrm{113}}^1\times {\mathrm{12391}}^1$

素因数の和:12512

約数の個数: 16

約数和(自身を含む): 33904512

約数和(自身を除く): 12901767

約数列:

[1, 3, 5, 15, 113, 339, 565, 1695, 12391, 37173, 61955, 185865, 1400183, 4200549, 7000915, 21002745]

約数ペア:

[(1, 21002745), (3, 7000915), (5, 4200549), (15, 1400183), (113, 185865), (339, 61955), (565, 37173), (1695, 12391)]