21180201

素因数分解:

$3^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{967}}^1$

素因数の和:1133

約数の個数: 24

約数和(自身を含む): 33105600

約数和(自身を除く): 11925399

約数列:

[1, 3, 7, 21, 49, 147, 149, 447, 967, 1043, 2901, 3129, 6769, 7301, 20307, 21903, 47383, 142149, 144083, 432249, 1008581, 3025743, 7060067, 21180201]

約数ペア:

[(1, 21180201), (3, 7060067), (7, 3025743), (21, 1008581), (49, 432249), (147, 144083), (149, 142149), (447, 47383), (967, 21903), (1043, 20307), (2901, 7301), (3129, 6769)]