19968981

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{1571}}^1$

素因数の和:1816

約数の個数: 16

約数和(自身を含む): 28170240

約数和(自身を除く): 8201259

約数列:

[1, 3, 19, 57, 223, 669, 1571, 4237, 4713, 12711, 29849, 89547, 350333, 1050999, 6656327, 19968981]

約数ペア:

[(1, 19968981), (3, 6656327), (19, 1050999), (57, 350333), (223, 89547), (669, 29849), (1571, 12711), (4237, 4713)]