1821141

素因数分解:

$3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{211}}^1$

素因数の和:361

約数の個数: 24

約数和(自身を含む): 3042624

約数和(自身を除く): 1221483

約数列:

[1, 3, 7, 9, 21, 63, 137, 211, 411, 633, 959, 1233, 1477, 1899, 2877, 4431, 8631, 13293, 28907, 86721, 202349, 260163, 607047, 1821141]

約数ペア:

[(1, 1821141), (3, 607047), (7, 260163), (9, 202349), (21, 86721), (63, 28907), (137, 13293), (211, 8631), (411, 4431), (633, 2877), (959, 1899), (1233, 1477)]