20209178

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{37}}^2\times {\mathrm{61}}^1$

素因数の和:159

約数の個数: 36

約数和(自身を含む): 34806366

約数和(自身を除く): 14597188

約数列:

[1, 2, 11, 22, 37, 61, 74, 121, 122, 242, 407, 671, 814, 1342, 1369, 2257, 2738, 4477, 4514, 7381, 8954, 14762, 15059, 24827, 30118, 49654, 83509, 165649, 167018, 273097, 331298, 546194, 918599, 1837198, 10104589, 20209178]

約数ペア:

[(1, 20209178), (2, 10104589), (11, 1837198), (22, 918599), (37, 546194), (61, 331298), (74, 273097), (121, 167018), (122, 165649), (242, 83509), (407, 49654), (671, 30118), (814, 24827), (1342, 15059), (1369, 14762), (2257, 8954), (2738, 7381), (4477, 4514)]