20805213212

素因数分解:

$2^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{881}}^1\times {\mathrm{1697}}^1$

素因数の和:2667

約数の個数: 72

約数和(自身を含む): 43024087008

約数和(自身を除く): 22218873796

約数列:

[1, 2, 4, 7, 14, 28, 49, 71, 98, 142, 196, 284, 497, 881, 994, 1697, 1762, 1988, 3394, 3479, 3524, 6167, 6788, 6958, 11879, 12334, 13916, 23758, 24668, 43169, 47516, 62551, 83153, 86338, 120487, 125102, 166306, 172676, 240974, 250204, 332612, 437857, 481948, 843409, 875714, 1495057, 1686818, 1751428, 2990114, 3064999, 3373636, 5903863, 5980228, 6129998, 10465399, 11807726, 12259996, 20930798, 23615452, 41861596, 73257793, 106149047, 146515586, 212298094, 293031172, 424596188, 743043329, 1486086658, 2972173316, 5201303303, 10402606606, 20805213212]

約数ペア:

[(1, 20805213212), (2, 10402606606), (4, 5201303303), (7, 2972173316), (14, 1486086658), (28, 743043329), (49, 424596188), (71, 293031172), (98, 212298094), (142, 146515586), (196, 106149047), (284, 73257793), (497, 41861596), (881, 23615452), (994, 20930798), (1697, 12259996), (1762, 11807726), (1988, 10465399), (3394, 6129998), (3479, 5980228), (3524, 5903863), (6167, 3373636), (6788, 3064999), (6958, 2990114), (11879, 1751428), (12334, 1686818), (13916, 1495057), (23758, 875714), (24668, 843409), (43169, 481948), (47516, 437857), (62551, 332612), (83153, 250204), (86338, 240974), (120487, 172676), (125102, 166306)]