30821980

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{4493}}^1$

素因数の和:4523

約数の個数: 48

約数和(自身を含む): 75499200

約数和(自身を除く): 44677220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 3430, 4493, 6860, 8986, 17972, 22465, 31451, 44930, 62902, 89860, 125804, 157255, 220157, 314510, 440314, 629020, 880628, 1100785, 1541099, 2201570, 3082198, 4403140, 6164396, 7705495, 15410990, 30821980]

約数ペア:

[(1, 30821980), (2, 15410990), (4, 7705495), (5, 6164396), (7, 4403140), (10, 3082198), (14, 2201570), (20, 1541099), (28, 1100785), (35, 880628), (49, 629020), (70, 440314), (98, 314510), (140, 220157), (196, 157255), (245, 125804), (343, 89860), (490, 62902), (686, 44930), (980, 31451), (1372, 22465), (1715, 17972), (3430, 8986), (4493, 6860)]