20967280

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{1759}}^1$

素因数の和:1921

約数の個数: 40

約数和(自身を含む): 49104000

約数和(自身を除く): 28136720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 1759, 2384, 2980, 3518, 5960, 7036, 8795, 11920, 14072, 17590, 28144, 35180, 70360, 140720, 262091, 524182, 1048364, 1310455, 2096728, 2620910, 4193456, 5241820, 10483640, 20967280]

約数ペア:

[(1, 20967280), (2, 10483640), (4, 5241820), (5, 4193456), (8, 2620910), (10, 2096728), (16, 1310455), (20, 1048364), (40, 524182), (80, 262091), (149, 140720), (298, 70360), (596, 35180), (745, 28144), (1192, 17590), (1490, 14072), (1759, 11920), (2384, 8795), (2980, 7036), (3518, 5960)]