21000120

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1259}}^1$

素因数の和:1412

約数の個数: 64

約数和(自身を含む): 63504000

約数和(自身を除く): 42503880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 139, 278, 417, 556, 695, 834, 1112, 1259, 1390, 1668, 2085, 2518, 2780, 3336, 3777, 4170, 5036, 5560, 6295, 7554, 8340, 10072, 12590, 15108, 16680, 18885, 25180, 30216, 37770, 50360, 75540, 151080, 175001, 350002, 525003, 700004, 875005, 1050006, 1400008, 1750010, 2100012, 2625015, 3500020, 4200024, 5250030, 7000040, 10500060, 21000120]

約数ペア:

[(1, 21000120), (2, 10500060), (3, 7000040), (4, 5250030), (5, 4200024), (6, 3500020), (8, 2625015), (10, 2100012), (12, 1750010), (15, 1400008), (20, 1050006), (24, 875005), (30, 700004), (40, 525003), (60, 350002), (120, 175001), (139, 151080), (278, 75540), (417, 50360), (556, 37770), (695, 30216), (834, 25180), (1112, 18885), (1259, 16680), (1390, 15108), (1668, 12590), (2085, 10072), (2518, 8340), (2780, 7554), (3336, 6295), (3777, 5560), (4170, 5036)]