20578628

素因数分解:

$2^2\times 7^3\times {\mathrm{53}}^1\times {\mathrm{283}}^1$

素因数の和:361

約数の個数: 48

約数和(自身を含む): 42940800

約数和(自身を除く): 22362172

約数列:

[1, 2, 4, 7, 14, 28, 49, 53, 98, 106, 196, 212, 283, 343, 371, 566, 686, 742, 1132, 1372, 1484, 1981, 2597, 3962, 5194, 7924, 10388, 13867, 14999, 18179, 27734, 29998, 36358, 55468, 59996, 72716, 97069, 104993, 194138, 209986, 388276, 419972, 734951, 1469902, 2939804, 5144657, 10289314, 20578628]

約数ペア:

[(1, 20578628), (2, 10289314), (4, 5144657), (7, 2939804), (14, 1469902), (28, 734951), (49, 419972), (53, 388276), (98, 209986), (106, 194138), (196, 104993), (212, 97069), (283, 72716), (343, 59996), (371, 55468), (566, 36358), (686, 29998), (742, 27734), (1132, 18179), (1372, 14999), (1484, 13867), (1981, 10388), (2597, 7924), (3962, 5194)]