21611721

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{5659}}^1$

素因数の和:5748

約数の個数: 16

約数和(自身を含む): 30790400

約数和(自身を除く): 9178679

約数列:

[1, 3, 19, 57, 67, 201, 1273, 3819, 5659, 16977, 107521, 322563, 379153, 1137459, 7203907, 21611721]

約数ペア:

[(1, 21611721), (3, 7203907), (19, 1137459), (57, 379153), (67, 322563), (201, 107521), (1273, 16977), (3819, 5659)]