19979680

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{17839}}^1$

素因数の和:17861

約数の個数: 48

約数和(自身を含む): 53948160

約数和(自身を除く): 33968480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 17839, 35678, 71356, 89195, 124873, 142712, 178390, 249746, 285424, 356780, 499492, 570848, 624365, 713560, 998984, 1248730, 1427120, 1997968, 2497460, 2854240, 3995936, 4994920, 9989840, 19979680]

約数ペア:

[(1, 19979680), (2, 9989840), (4, 4994920), (5, 3995936), (7, 2854240), (8, 2497460), (10, 1997968), (14, 1427120), (16, 1248730), (20, 998984), (28, 713560), (32, 624365), (35, 570848), (40, 499492), (56, 356780), (70, 285424), (80, 249746), (112, 178390), (140, 142712), (160, 124873), (224, 89195), (280, 71356), (560, 35678), (1120, 17839)]