21398778

素因数分解:

$2^1\times 3^2\times {\mathrm{43}}^1\times {\mathrm{27647}}^1$

素因数の和:27698

約数の個数: 24

約数和(自身を含む): 47443968

約数和(自身を除く): 26045190

約数列:

[1, 2, 3, 6, 9, 18, 43, 86, 129, 258, 387, 774, 27647, 55294, 82941, 165882, 248823, 497646, 1188821, 2377642, 3566463, 7132926, 10699389, 21398778]

約数ペア:

[(1, 21398778), (2, 10699389), (3, 7132926), (6, 3566463), (9, 2377642), (18, 1188821), (43, 497646), (86, 248823), (129, 165882), (258, 82941), (387, 55294), (774, 27647)]