128503120

素因数分解:

$2^4\times 5^1\times {\mathrm{1606289}}^1$

素因数の和:1606302

約数の個数: 20

約数和(自身を含む): 298769940

約数和(自身を除く): 170266820

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1606289, 3212578, 6425156, 8031445, 12850312, 16062890, 25700624, 32125780, 64251560, 128503120]

約数ペア:

[(1, 128503120), (2, 64251560), (4, 32125780), (5, 25700624), (8, 16062890), (10, 12850312), (16, 8031445), (20, 6425156), (40, 3212578), (80, 1606289)]