128923120

素因数分解:

$2^4\times 5^1\times {\mathrm{1611539}}^1$

素因数の和:1611552

約数の個数: 20

約数和(自身を含む): 299746440

約数和(自身を除く): 170823320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1611539, 3223078, 6446156, 8057695, 12892312, 16115390, 25784624, 32230780, 64461560, 128923120]

約数ペア:

[(1, 128923120), (2, 64461560), (4, 32230780), (5, 25784624), (8, 16115390), (10, 12892312), (16, 8057695), (20, 6446156), (40, 3223078), (80, 1611539)]