256081.0000000

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 12221440

約数和(自身を除く): 4564903

約数列:

[1, 3, 7, 21, 43, 61, 129, 139, 183, 301, 417, 427, 903, 973, 1281, 2623, 2919, 5977, 7869, 8479, 17931, 18361, 25437, 41839, 55083, 59353, 125517, 178059, 364597, 1093791, 2552179, 7656537]

約数ペア:

[(1, 7656537), (3, 2552179), (7, 1093791), (21, 364597), (43, 178059), (61, 125517), (129, 59353), (139, 55083), (183, 41839), (301, 25437), (417, 18361), (427, 17931), (903, 8479), (973, 7869), (1281, 5977), (2623, 2919)]