20864641

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{307}}^1$

素因数の和:413

約数の個数: 24

約数和(自身を含む): 25982880

約数和(自身を除く): 5118239

約数列:

[1, 7, 19, 49, 73, 133, 307, 511, 931, 1387, 2149, 3577, 5833, 9709, 15043, 22411, 40831, 67963, 156877, 285817, 425809, 1098139, 2980663, 20864641]

約数ペア:

[(1, 20864641), (7, 2980663), (19, 1098139), (49, 425809), (73, 285817), (133, 156877), (307, 67963), (511, 40831), (931, 22411), (1387, 15043), (2149, 9709), (3577, 5833)]