1278439490

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1800619}}^1$

素因数の和:1800697

約数の個数: 16

約数和(自身を含む): 2333603520

約数和(自身を除く): 1055164030

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 1800619, 3601238, 9003095, 18006190, 127843949, 255687898, 639219745, 1278439490]

約数ペア:

[(1, 1278439490), (2, 639219745), (5, 255687898), (10, 127843949), (71, 18006190), (142, 9003095), (355, 3601238), (710, 1800619)]