20814563

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{73}}^1$

素因数の和:144

約数の個数: 36

約数和(自身を含む): 27990648

約数和(自身を除く): 7176085

約数列:

[1, 7, 11, 23, 49, 73, 77, 161, 253, 511, 529, 539, 803, 1127, 1679, 1771, 3577, 3703, 5621, 5819, 11753, 12397, 18469, 25921, 38617, 39347, 40733, 82271, 129283, 270319, 285131, 424787, 904981, 1892233, 2973509, 20814563]

約数ペア:

[(1, 20814563), (7, 2973509), (11, 1892233), (23, 904981), (49, 424787), (73, 285131), (77, 270319), (161, 129283), (253, 82271), (511, 40733), (529, 39347), (539, 38617), (803, 25921), (1127, 18469), (1679, 12397), (1771, 11753), (3577, 5819), (3703, 5621)]