257291489

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{1399}}^1$

素因数の和:1509

約数の個数: 32

約数和(自身を含む): 331161600

約数和(自身を除く): 73870111

約数列:

[1, 7, 13, 43, 47, 91, 301, 329, 559, 611, 1399, 2021, 3913, 4277, 9793, 14147, 18187, 26273, 60157, 65753, 127309, 183911, 421099, 460271, 782041, 854789, 2827379, 5474287, 5983523, 19791653, 36755927, 257291489]

約数ペア:

[(1, 257291489), (7, 36755927), (13, 19791653), (43, 5983523), (47, 5474287), (91, 2827379), (301, 854789), (329, 782041), (559, 460271), (611, 421099), (1399, 183911), (2021, 127309), (3913, 65753), (4277, 60157), (9793, 26273), (14147, 18187)]