128877040

素因数分解:

$2^4\times 5^1\times {\mathrm{1610963}}^1$

素因数の和:1610976

約数の個数: 20

約数和(自身を含む): 299639304

約数和(自身を除く): 170762264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1610963, 3221926, 6443852, 8054815, 12887704, 16109630, 25775408, 32219260, 64438520, 128877040]

約数ペア:

[(1, 128877040), (2, 64438520), (4, 32219260), (5, 25775408), (8, 16109630), (10, 12887704), (16, 8054815), (20, 6443852), (40, 3221926), (80, 1610963)]