20391693

素因数分解:

$3^1\times 7^4\times {\mathrm{19}}^1\times {\mathrm{149}}^1$

素因数の和:199

約数の個数: 40

約数和(自身を含む): 33612000

約数和(自身を除く): 13220307

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 149, 343, 399, 447, 931, 1029, 1043, 2401, 2793, 2831, 3129, 6517, 7203, 7301, 8493, 19551, 19817, 21903, 45619, 51107, 59451, 136857, 138719, 153321, 357749, 416157, 971033, 1073247, 2913099, 6797231, 20391693]

約数ペア:

[(1, 20391693), (3, 6797231), (7, 2913099), (19, 1073247), (21, 971033), (49, 416157), (57, 357749), (133, 153321), (147, 138719), (149, 136857), (343, 59451), (399, 51107), (447, 45619), (931, 21903), (1029, 19817), (1043, 19551), (2401, 8493), (2793, 7301), (2831, 7203), (3129, 6517)]