20607440

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{751}}^1$

素因数の和:785

約数の個数: 80

約数和(自身を含む): 55948800

約数和(自身を除く): 35341360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 343, 392, 490, 560, 686, 751, 784, 980, 1372, 1502, 1715, 1960, 2744, 3004, 3430, 3755, 3920, 5257, 5488, 6008, 6860, 7510, 10514, 12016, 13720, 15020, 21028, 26285, 27440, 30040, 36799, 42056, 52570, 60080, 73598, 84112, 105140, 147196, 183995, 210280, 257593, 294392, 367990, 420560, 515186, 588784, 735980, 1030372, 1287965, 1471960, 2060744, 2575930, 2943920, 4121488, 5151860, 10303720, 20607440]

約数ペア:

[(1, 20607440), (2, 10303720), (4, 5151860), (5, 4121488), (7, 2943920), (8, 2575930), (10, 2060744), (14, 1471960), (16, 1287965), (20, 1030372), (28, 735980), (35, 588784), (40, 515186), (49, 420560), (56, 367990), (70, 294392), (80, 257593), (98, 210280), (112, 183995), (140, 147196), (196, 105140), (245, 84112), (280, 73598), (343, 60080), (392, 52570), (490, 42056), (560, 36799), (686, 30040), (751, 27440), (784, 26285), (980, 21028), (1372, 15020), (1502, 13720), (1715, 12016), (1960, 10514), (2744, 7510), (3004, 6860), (3430, 6008), (3755, 5488), (3920, 5257)]