18820473

素因数分解:

$3^1\times 7^1\times {\mathrm{557}}^1\times {\mathrm{1609}}^1$

素因数の和:2176

約数の個数: 16

約数和(自身を含む): 28748160

約数和(自身を除く): 9927687

約数列:

[1, 3, 7, 21, 557, 1609, 1671, 3899, 4827, 11263, 11697, 33789, 896213, 2688639, 6273491, 18820473]

約数ペア:

[(1, 18820473), (3, 6273491), (7, 2688639), (21, 896213), (557, 33789), (1609, 11697), (1671, 11263), (3899, 4827)]