20752940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4201}}^1$

素因数の和:4242

約数の個数: 48

約数和(自身を含む): 49415520

約数和(自身を除く): 28662580

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4201, 4940, 8402, 16804, 21005, 42010, 54613, 79819, 84020, 109226, 159638, 218452, 273065, 319276, 399095, 546130, 798190, 1037647, 1092260, 1596380, 2075294, 4150588, 5188235, 10376470, 20752940]

約数ペア:

[(1, 20752940), (2, 10376470), (4, 5188235), (5, 4150588), (10, 2075294), (13, 1596380), (19, 1092260), (20, 1037647), (26, 798190), (38, 546130), (52, 399095), (65, 319276), (76, 273065), (95, 218452), (130, 159638), (190, 109226), (247, 84020), (260, 79819), (380, 54613), (494, 42010), (988, 21005), (1235, 16804), (2470, 8402), (4201, 4940)]