19810155

素因数分解:

$3^1\times 5^1\times {\mathrm{421}}^1\times {\mathrm{3137}}^1$

素因数の和:3566

約数の個数: 16

約数和(自身を含む): 31781664

約数和(自身を除く): 11971509

約数列:

[1, 3, 5, 15, 421, 1263, 2105, 3137, 6315, 9411, 15685, 47055, 1320677, 3962031, 6603385, 19810155]

約数ペア:

[(1, 19810155), (3, 6603385), (5, 3962031), (15, 1320677), (421, 47055), (1263, 15685), (2105, 9411), (3137, 6315)]