128696380

素因数分解:

$2^2\times 5^1\times {\mathrm{1721}}^1\times {\mathrm{3739}}^1$

素因数の和:5469

約数の個数: 24

約数和(自身を含む): 270491760

約数和(自身を除く): 141795380

約数列:

[1, 2, 4, 5, 10, 20, 1721, 3442, 3739, 6884, 7478, 8605, 14956, 17210, 18695, 34420, 37390, 74780, 6434819, 12869638, 25739276, 32174095, 64348190, 128696380]

約数ペア:

[(1, 128696380), (2, 64348190), (4, 32174095), (5, 25739276), (10, 12869638), (20, 6434819), (1721, 74780), (3442, 37390), (3739, 34420), (6884, 18695), (7478, 17210), (8605, 14956)]