19996156

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{389}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 35773920

約数和(自身を除く): 15777764

約数列:

[1, 2, 4, 71, 142, 181, 284, 362, 389, 724, 778, 1556, 12851, 25702, 27619, 51404, 55238, 70409, 110476, 140818, 281636, 4999039, 9998078, 19996156]

約数ペア:

[(1, 19996156), (2, 9998078), (4, 4999039), (71, 281636), (142, 140818), (181, 110476), (284, 70409), (362, 55238), (389, 51404), (724, 27619), (778, 25702), (1556, 12851)]