129777280

素因数分解:

$2^7\times 5^1\times {\mathrm{202777}}^1$

素因数の和:202796

約数の個数: 32

約数和(自身を含む): 310250340

約数和(自身を除く): 180473060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 202777, 405554, 811108, 1013885, 1622216, 2027770, 3244432, 4055540, 6488864, 8111080, 12977728, 16222160, 25955456, 32444320, 64888640, 129777280]

約数ペア:

[(1, 129777280), (2, 64888640), (4, 32444320), (5, 25955456), (8, 16222160), (10, 12977728), (16, 8111080), (20, 6488864), (32, 4055540), (40, 3244432), (64, 2027770), (80, 1622216), (128, 1013885), (160, 811108), (320, 405554), (640, 202777)]