64438520

素因数分解:

$2^3\times 5^1\times {\mathrm{1610963}}^1$

素因数の和:1610974

約数の個数: 16

約数和(自身を含む): 144986760

約数和(自身を除く): 80548240

約数列:

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

約数ペア:

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