21040719

素因数分解:

$3^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{4493}}^1$

素因数の和:4726

約数の個数: 16

約数和(自身を含む): 32212992

約数和(自身を除く): 11172273

約数列:

[1, 3, 7, 21, 223, 669, 1561, 4493, 4683, 13479, 31451, 94353, 1001939, 3005817, 7013573, 21040719]

約数ペア:

[(1, 21040719), (3, 7013573), (7, 3005817), (21, 1001939), (223, 94353), (669, 31451), (1561, 13479), (4493, 4683)]