20364680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{283}}^1$

素因数の和:558

約数の個数: 64

約数和(自身を含む): 52755840

約数和(自身を除く): 32391160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 257, 280, 283, 514, 566, 1028, 1132, 1285, 1415, 1799, 1981, 2056, 2264, 2570, 2830, 3598, 3962, 5140, 5660, 7196, 7924, 8995, 9905, 10280, 11320, 14392, 15848, 17990, 19810, 35980, 39620, 71960, 72731, 79240, 145462, 290924, 363655, 509117, 581848, 727310, 1018234, 1454620, 2036468, 2545585, 2909240, 4072936, 5091170, 10182340, 20364680]

約数ペア:

[(1, 20364680), (2, 10182340), (4, 5091170), (5, 4072936), (7, 2909240), (8, 2545585), (10, 2036468), (14, 1454620), (20, 1018234), (28, 727310), (35, 581848), (40, 509117), (56, 363655), (70, 290924), (140, 145462), (257, 79240), (280, 72731), (283, 71960), (514, 39620), (566, 35980), (1028, 19810), (1132, 17990), (1285, 15848), (1415, 14392), (1799, 11320), (1981, 10280), (2056, 9905), (2264, 8995), (2570, 7924), (2830, 7196), (3598, 5660), (3962, 5140)]