20507985

素因数分解:

$3^5\times 5^1\times {\mathrm{16879}}^1$

素因数の和:16899

約数の個数: 24

約数和(自身を含む): 36865920

約数和(自身を除く): 16357935

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 16879, 50637, 84395, 151911, 253185, 455733, 759555, 1367199, 2278665, 4101597, 6835995, 20507985]

約数ペア:

[(1, 20507985), (3, 6835995), (5, 4101597), (9, 2278665), (15, 1367199), (27, 759555), (45, 455733), (81, 253185), (135, 151911), (243, 84395), (405, 50637), (1215, 16879)]