1321940

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{421}}^1$

素因数の和:587

約数の個数: 24

約数和(自身を含む): 2800392

約数和(自身を除く): 1478452

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 421, 628, 785, 842, 1570, 1684, 2105, 3140, 4210, 8420, 66097, 132194, 264388, 330485, 660970, 1321940]

約数ペア:

[(1, 1321940), (2, 660970), (4, 330485), (5, 264388), (10, 132194), (20, 66097), (157, 8420), (314, 4210), (421, 3140), (628, 2105), (785, 1684), (842, 1570)]