19701213

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{571}}^1$

素因数の和:665

約数の個数: 32

約数和(自身を含む): 31629312

約数和(自身を除く): 11928099

約数列:

[1, 3, 7, 21, 31, 53, 93, 159, 217, 371, 571, 651, 1113, 1643, 1713, 3997, 4929, 11501, 11991, 17701, 30263, 34503, 53103, 90789, 123907, 211841, 371721, 635523, 938153, 2814459, 6567071, 19701213]

約数ペア:

[(1, 19701213), (3, 6567071), (7, 2814459), (21, 938153), (31, 635523), (53, 371721), (93, 211841), (159, 123907), (217, 90789), (371, 53103), (571, 34503), (651, 30263), (1113, 17701), (1643, 11991), (1713, 11501), (3997, 4929)]