21050720

素因数分解:

$2^5\times 5^1\times {\mathrm{149}}^1\times {\mathrm{883}}^1$

素因数の和:1047

約数の個数: 48

約数和(自身を含む): 50122800

約数和(自身を除く): 29072080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 149, 160, 298, 596, 745, 883, 1192, 1490, 1766, 2384, 2980, 3532, 4415, 4768, 5960, 7064, 8830, 11920, 14128, 17660, 23840, 28256, 35320, 70640, 131567, 141280, 263134, 526268, 657835, 1052536, 1315670, 2105072, 2631340, 4210144, 5262680, 10525360, 21050720]

約数ペア:

[(1, 21050720), (2, 10525360), (4, 5262680), (5, 4210144), (8, 2631340), (10, 2105072), (16, 1315670), (20, 1052536), (32, 657835), (40, 526268), (80, 263134), (149, 141280), (160, 131567), (298, 70640), (596, 35320), (745, 28256), (883, 23840), (1192, 17660), (1490, 14128), (1766, 11920), (2384, 8830), (2980, 7064), (3532, 5960), (4415, 4768)]