21739621820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{444937}}^1$

素因数の和:445302

約数の個数: 48

約数和(自身を含む): 52324708800

約数和(自身を除く): 30585086980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 349, 698, 1396, 1745, 2443, 3490, 4886, 6980, 9772, 12215, 24430, 48860, 444937, 889874, 1779748, 2224685, 3114559, 4449370, 6229118, 8898740, 12458236, 15572795, 31145590, 62291180, 155283013, 310566026, 621132052, 776415065, 1086981091, 1552830130, 2173962182, 3105660260, 4347924364, 5434905455, 10869810910, 21739621820]

約数ペア:

[(1, 21739621820), (2, 10869810910), (4, 5434905455), (5, 4347924364), (7, 3105660260), (10, 2173962182), (14, 1552830130), (20, 1086981091), (28, 776415065), (35, 621132052), (70, 310566026), (140, 155283013), (349, 62291180), (698, 31145590), (1396, 15572795), (1745, 12458236), (2443, 8898740), (3490, 6229118), (4886, 4449370), (6980, 3114559), (9772, 2224685), (12215, 1779748), (24430, 889874), (48860, 444937)]