257430719

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{757}}^1$

素因数の和:915

約数の個数: 32

約数和(自身を含む): 329056896

約数和(自身を除く): 71626177

約数列:

[1, 7, 13, 37, 91, 101, 259, 481, 707, 757, 1313, 3367, 3737, 5299, 9191, 9841, 26159, 28009, 48581, 68887, 76457, 196063, 340067, 364117, 535199, 993941, 2548819, 2828909, 6957587, 19802363, 36775817, 257430719]

約数ペア:

[(1, 257430719), (7, 36775817), (13, 19802363), (37, 6957587), (91, 2828909), (101, 2548819), (259, 993941), (481, 535199), (707, 364117), (757, 340067), (1313, 196063), (3367, 76457), (3737, 68887), (5299, 48581), (9191, 28009), (9841, 26159)]