19681240

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{281}}^1$

素因数の和:412

約数の個数: 64

約数和(自身を含む): 47511360

約数和(自身を除く): 27830120

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 103, 136, 170, 206, 281, 340, 412, 515, 562, 680, 824, 1030, 1124, 1405, 1751, 2060, 2248, 2810, 3502, 4120, 4777, 5620, 7004, 8755, 9554, 11240, 14008, 17510, 19108, 23885, 28943, 35020, 38216, 47770, 57886, 70040, 95540, 115772, 144715, 191080, 231544, 289430, 492031, 578860, 984062, 1157720, 1968124, 2460155, 3936248, 4920310, 9840620, 19681240]

約数ペア:

[(1, 19681240), (2, 9840620), (4, 4920310), (5, 3936248), (8, 2460155), (10, 1968124), (17, 1157720), (20, 984062), (34, 578860), (40, 492031), (68, 289430), (85, 231544), (103, 191080), (136, 144715), (170, 115772), (206, 95540), (281, 70040), (340, 57886), (412, 47770), (515, 38216), (562, 35020), (680, 28943), (824, 23885), (1030, 19108), (1124, 17510), (1405, 14008), (1751, 11240), (2060, 9554), (2248, 8755), (2810, 7004), (3502, 5620), (4120, 4777)]