639837

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{281}}^1$

素因数の和:321

約数の個数: 24

約数和(自身を含む): 1055808

約数和(自身を除く): 415971

約数列:

[1, 3, 9, 11, 23, 33, 69, 99, 207, 253, 281, 759, 843, 2277, 2529, 3091, 6463, 9273, 19389, 27819, 58167, 71093, 213279, 639837]

約数ペア:

[(1, 639837), (3, 213279), (9, 71093), (11, 58167), (23, 27819), (33, 19389), (69, 9273), (99, 6463), (207, 3091), (253, 2529), (281, 2277), (759, 843)]