21428955

素因数分解:

$3^6\times 5^1\times {\mathrm{5879}}^1$

素因数の和:5902

約数の個数: 28

約数和(自身を含む): 38561040

約数和(自身を除く): 17132085

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 3645, 5879, 17637, 29395, 52911, 88185, 158733, 264555, 476199, 793665, 1428597, 2380995, 4285791, 7142985, 21428955]

約数ペア:

[(1, 21428955), (3, 7142985), (5, 4285791), (9, 2380995), (15, 1428597), (27, 793665), (45, 476199), (81, 264555), (135, 158733), (243, 88185), (405, 52911), (729, 29395), (1215, 17637), (3645, 5879)]