20675840

素因数分解:

$2^8\times 5^1\times {\mathrm{29}}^1\times {\mathrm{557}}^1$

素因数の和:607

約数の個数: 72

約数和(自身を含む): 51324840

約数和(自身を除く): 30649000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145, 160, 232, 256, 290, 320, 464, 557, 580, 640, 928, 1114, 1160, 1280, 1856, 2228, 2320, 2785, 3712, 4456, 4640, 5570, 7424, 8912, 9280, 11140, 16153, 17824, 18560, 22280, 32306, 35648, 37120, 44560, 64612, 71296, 80765, 89120, 129224, 142592, 161530, 178240, 258448, 323060, 356480, 516896, 646120, 712960, 1033792, 1292240, 2067584, 2584480, 4135168, 5168960, 10337920, 20675840]

約数ペア:

[(1, 20675840), (2, 10337920), (4, 5168960), (5, 4135168), (8, 2584480), (10, 2067584), (16, 1292240), (20, 1033792), (29, 712960), (32, 646120), (40, 516896), (58, 356480), (64, 323060), (80, 258448), (116, 178240), (128, 161530), (145, 142592), (160, 129224), (232, 89120), (256, 80765), (290, 71296), (320, 64612), (464, 44560), (557, 37120), (580, 35648), (640, 32306), (928, 22280), (1114, 18560), (1160, 17824), (1280, 16153), (1856, 11140), (2228, 9280), (2320, 8912), (2785, 7424), (3712, 5570), (4456, 4640)]