16405040

素因数分解:

$2^4\times 5^1\times {\mathrm{205063}}^1$

素因数の和:205076

約数の個数: 20

約数和(自身を含む): 38141904

約数和(自身を除く): 21736864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 205063, 410126, 820252, 1025315, 1640504, 2050630, 3281008, 4101260, 8202520, 16405040]

約数ペア:

[(1, 16405040), (2, 8202520), (4, 4101260), (5, 3281008), (8, 2050630), (10, 1640504), (16, 1025315), (20, 820252), (40, 410126), (80, 205063)]