21125556

素因数分解:

$2^2\times 3^3\times {\mathrm{43}}^1\times {\mathrm{4549}}^1$

素因数の和:4605

約数の個数: 48

約数和(自身を含む): 56056000

約数和(自身を除く): 34930444

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 43, 54, 86, 108, 129, 172, 258, 387, 516, 774, 1161, 1548, 2322, 4549, 4644, 9098, 13647, 18196, 27294, 40941, 54588, 81882, 122823, 163764, 195607, 245646, 391214, 491292, 586821, 782428, 1173642, 1760463, 2347284, 3520926, 5281389, 7041852, 10562778, 21125556]

約数ペア:

[(1, 21125556), (2, 10562778), (3, 7041852), (4, 5281389), (6, 3520926), (9, 2347284), (12, 1760463), (18, 1173642), (27, 782428), (36, 586821), (43, 491292), (54, 391214), (86, 245646), (108, 195607), (129, 163764), (172, 122823), (258, 81882), (387, 54588), (516, 40941), (774, 27294), (1161, 18196), (1548, 13647), (2322, 9098), (4549, 4644)]