19531988

素因数分解:

$2^2\times 7^2\times {\mathrm{227}}^1\times {\mathrm{439}}^1$

素因数の和:684

約数の個数: 36

約数和(自身を含む): 40027680

約数和(自身を除く): 20495692

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 227, 439, 454, 878, 908, 1589, 1756, 3073, 3178, 6146, 6356, 11123, 12292, 21511, 22246, 43022, 44492, 86044, 99653, 199306, 398612, 697571, 1395142, 2790284, 4882997, 9765994, 19531988]

約数ペア:

[(1, 19531988), (2, 9765994), (4, 4882997), (7, 2790284), (14, 1395142), (28, 697571), (49, 398612), (98, 199306), (196, 99653), (227, 86044), (439, 44492), (454, 43022), (878, 22246), (908, 21511), (1589, 12292), (1756, 11123), (3073, 6356), (3178, 6146)]