20403691

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{281}}^1$

素因数の和:363

約数の個数: 32

約数和(自身を含む): 27288576

約数和(自身を除く): 6884885

約数列:

[1, 7, 11, 23, 41, 77, 161, 253, 281, 287, 451, 943, 1771, 1967, 3091, 3157, 6463, 6601, 10373, 11521, 21637, 45241, 71093, 72611, 80647, 126731, 264983, 497651, 887117, 1854881, 2914813, 20403691]

約数ペア:

[(1, 20403691), (7, 2914813), (11, 1854881), (23, 887117), (41, 497651), (77, 264983), (161, 126731), (253, 80647), (281, 72611), (287, 71093), (451, 45241), (943, 21637), (1771, 11521), (1967, 10373), (3091, 6601), (3157, 6463)]