289740020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1\times {\mathrm{1693}}^1$

素因数の和:1944

約数の個数: 48

約数和(自身を含む): 626102400

約数和(自身を除く): 336362380

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 199, 215, 398, 430, 796, 860, 995, 1693, 1990, 3386, 3980, 6772, 8465, 8557, 16930, 17114, 33860, 34228, 42785, 72799, 85570, 145598, 171140, 291196, 336907, 363995, 673814, 727990, 1347628, 1455980, 1684535, 3369070, 6738140, 14487001, 28974002, 57948004, 72435005, 144870010, 289740020]

約数ペア:

[(1, 289740020), (2, 144870010), (4, 72435005), (5, 57948004), (10, 28974002), (20, 14487001), (43, 6738140), (86, 3369070), (172, 1684535), (199, 1455980), (215, 1347628), (398, 727990), (430, 673814), (796, 363995), (860, 336907), (995, 291196), (1693, 171140), (1990, 145598), (3386, 85570), (3980, 72799), (6772, 42785), (8465, 34228), (8557, 33860), (16930, 17114)]