20019158005

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{390961}}^1$

素因数の和:391010

約数の個数: 48

約数和(自身を含む): 32090160960

約数和(自身を除く): 12071002955

約数列:

[1, 5, 7, 11, 19, 35, 49, 55, 77, 95, 133, 209, 245, 385, 539, 665, 931, 1045, 1463, 2695, 4655, 7315, 10241, 51205, 390961, 1954805, 2736727, 4300571, 7428259, 13683635, 19157089, 21502855, 30103997, 37141295, 51997813, 81710849, 95785445, 150519985, 210727979, 259989065, 363984691, 408554245, 571975943, 1053639895, 1819923455, 2859879715, 4003831601, 20019158005]

約数ペア:

[(1, 20019158005), (5, 4003831601), (7, 2859879715), (11, 1819923455), (19, 1053639895), (35, 571975943), (49, 408554245), (55, 363984691), (77, 259989065), (95, 210727979), (133, 150519985), (209, 95785445), (245, 81710849), (385, 51997813), (539, 37141295), (665, 30103997), (931, 21502855), (1045, 19157089), (1463, 13683635), (2695, 7428259), (4655, 4300571), (7315, 2736727), (10241, 1954805), (51205, 390961)]