21486549

素因数分解:

$3^1\times 7^4\times {\mathrm{19}}^1\times {\mathrm{157}}^1$

素因数の和:207

約数の個数: 40

約数和(自身を含む): 35404640

約数和(自身を除く): 13918091

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 157, 343, 399, 471, 931, 1029, 1099, 2401, 2793, 2983, 3297, 6517, 7203, 7693, 8949, 19551, 20881, 23079, 45619, 53851, 62643, 136857, 146167, 161553, 376957, 438501, 1023169, 1130871, 3069507, 7162183, 21486549]

約数ペア:

[(1, 21486549), (3, 7162183), (7, 3069507), (19, 1130871), (21, 1023169), (49, 438501), (57, 376957), (133, 161553), (147, 146167), (157, 136857), (343, 62643), (399, 53851), (471, 45619), (931, 23079), (1029, 20881), (1099, 19551), (2401, 8949), (2793, 7693), (2983, 7203), (3297, 6517)]