281481040

素因数分解:

$2^4\times 5^1\times {\mathrm{3518513}}^1$

素因数の和:3518526

約数の個数: 20

約数和(自身を含む): 654443604

約数和(自身を除く): 372962564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3518513, 7037026, 14074052, 17592565, 28148104, 35185130, 56296208, 70370260, 140740520, 281481040]

約数ペア:

[(1, 281481040), (2, 140740520), (4, 70370260), (5, 56296208), (8, 35185130), (10, 28148104), (16, 17592565), (20, 14074052), (40, 7037026), (80, 3518513)]