20278220

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{409}}^1$

素因数の和:522

約数の個数: 48

約数和(自身を含む): 44496480

約数和(自身を除く): 24218260

約数列:

[1, 2, 4, 5, 10, 20, 37, 67, 74, 134, 148, 185, 268, 335, 370, 409, 670, 740, 818, 1340, 1636, 2045, 2479, 4090, 4958, 8180, 9916, 12395, 15133, 24790, 27403, 30266, 49580, 54806, 60532, 75665, 109612, 137015, 151330, 274030, 302660, 548060, 1013911, 2027822, 4055644, 5069555, 10139110, 20278220]

約数ペア:

[(1, 20278220), (2, 10139110), (4, 5069555), (5, 4055644), (10, 2027822), (20, 1013911), (37, 548060), (67, 302660), (74, 274030), (134, 151330), (148, 137015), (185, 109612), (268, 75665), (335, 60532), (370, 54806), (409, 49580), (670, 30266), (740, 27403), (818, 24790), (1340, 15133), (1636, 12395), (2045, 9916), (2479, 8180), (4090, 4958)]