256720490

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{14207}}^1$

素因数の和:14366

約数の個数: 32

約数和(自身を含む): 501258240

約数和(自身を除く): 244537750

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 139, 278, 695, 1390, 1807, 3614, 9035, 14207, 18070, 28414, 71035, 142070, 184691, 369382, 923455, 1846910, 1974773, 3949546, 9873865, 19747730, 25672049, 51344098, 128360245, 256720490]

約数ペア:

[(1, 256720490), (2, 128360245), (5, 51344098), (10, 25672049), (13, 19747730), (26, 9873865), (65, 3949546), (130, 1974773), (139, 1846910), (278, 923455), (695, 369382), (1390, 184691), (1807, 142070), (3614, 71035), (9035, 28414), (14207, 18070)]