28878423

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{461}}^1$

素因数の和:647

約数の個数: 32

約数和(自身を含む): 46717440

約数和(自身を除く): 17839017

約数列:

[1, 3, 7, 19, 21, 57, 133, 157, 399, 461, 471, 1099, 1383, 2983, 3227, 3297, 8759, 8949, 9681, 20881, 26277, 61313, 62643, 72377, 183939, 217131, 506639, 1375163, 1519917, 4125489, 9626141, 28878423]

約数ペア:

[(1, 28878423), (3, 9626141), (7, 4125489), (19, 1519917), (21, 1375163), (57, 506639), (133, 217131), (157, 183939), (399, 72377), (461, 62643), (471, 61313), (1099, 26277), (1383, 20881), (2983, 9681), (3227, 8949), (3297, 8759)]