21885721

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4937}}^1$

素因数の和:4992

約数の個数: 16

約数和(自身を含む): 26546688

約数和(自身を除く): 4660967

約数列:

[1, 11, 13, 31, 143, 341, 403, 4433, 4937, 54307, 64181, 153047, 705991, 1683517, 1989611, 21885721]

約数ペア:

[(1, 21885721), (11, 1989611), (13, 1683517), (31, 705991), (143, 153047), (341, 64181), (403, 54307), (4433, 4937)]