20736405

素因数分解:

$3^6\times 5^1\times {\mathrm{5689}}^1$

素因数の和:5712

約数の個数: 28

約数和(自身を含む): 37315020

約数和(自身を除く): 16578615

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 3645, 5689, 17067, 28445, 51201, 85335, 153603, 256005, 460809, 768015, 1382427, 2304045, 4147281, 6912135, 20736405]

約数ペア:

[(1, 20736405), (3, 6912135), (5, 4147281), (9, 2304045), (15, 1382427), (27, 768015), (45, 460809), (81, 256005), (135, 153603), (243, 85335), (405, 51201), (729, 28445), (1215, 17067), (3645, 5689)]