256375959

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1\times {\mathrm{1607}}^1$

素因数の和:1795

約数の個数: 32

約数和(自身を含む): 400121856

約数和(自身を除く): 143745897

約数列:

[1, 3, 7, 21, 71, 107, 213, 321, 497, 749, 1491, 1607, 2247, 4821, 7597, 11249, 22791, 33747, 53179, 114097, 159537, 171949, 342291, 515847, 798679, 1203643, 2396037, 3610929, 12208379, 36625137, 85458653, 256375959]

約数ペア:

[(1, 256375959), (3, 85458653), (7, 36625137), (21, 12208379), (71, 3610929), (107, 2396037), (213, 1203643), (321, 798679), (497, 515847), (749, 342291), (1491, 171949), (1607, 159537), (2247, 114097), (4821, 53179), (7597, 33747), (11249, 22791)]