128919680

素因数分解:

$2^7\times 5^1\times {\mathrm{201437}}^1$

素因数の和:201456

約数の個数: 32

約数和(自身を含む): 308200140

約数和(自身を除く): 179280460

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 201437, 402874, 805748, 1007185, 1611496, 2014370, 3222992, 4028740, 6445984, 8057480, 12891968, 16114960, 25783936, 32229920, 64459840, 128919680]

約数ペア:

[(1, 128919680), (2, 64459840), (4, 32229920), (5, 25783936), (8, 16114960), (10, 12891968), (16, 8057480), (20, 6445984), (32, 4028740), (40, 3222992), (64, 2014370), (80, 1611496), (128, 1007185), (160, 805748), (320, 402874), (640, 201437)]