21180439

素因数分解:

$7^1\times {\mathrm{73}}^1\times {\mathrm{181}}^1\times {\mathrm{229}}^1$

素因数の和:490

約数の個数: 16

約数和(自身を含む): 24781120

約数和(自身を除く): 3600681

約数列:

[1, 7, 73, 181, 229, 511, 1267, 1603, 13213, 16717, 41449, 92491, 117019, 290143, 3025777, 21180439]

約数ペア:

[(1, 21180439), (7, 3025777), (73, 290143), (181, 117019), (229, 92491), (511, 41449), (1267, 16717), (1603, 13213)]