19997488

素因数分解:

$2^4\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1109}}^1$

素因数の和:1154

約数の個数: 60

約数和(自身を含む): 47072880

約数和(自身を除く): 27075392

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 46, 49, 56, 92, 98, 112, 161, 184, 196, 322, 368, 392, 644, 784, 1109, 1127, 1288, 2218, 2254, 2576, 4436, 4508, 7763, 8872, 9016, 15526, 17744, 18032, 25507, 31052, 51014, 54341, 62104, 102028, 108682, 124208, 178549, 204056, 217364, 357098, 408112, 434728, 714196, 869456, 1249843, 1428392, 2499686, 2856784, 4999372, 9998744, 19997488]

約数ペア:

[(1, 19997488), (2, 9998744), (4, 4999372), (7, 2856784), (8, 2499686), (14, 1428392), (16, 1249843), (23, 869456), (28, 714196), (46, 434728), (49, 408112), (56, 357098), (92, 217364), (98, 204056), (112, 178549), (161, 124208), (184, 108682), (196, 102028), (322, 62104), (368, 54341), (392, 51014), (644, 31052), (784, 25507), (1109, 18032), (1127, 17744), (1288, 15526), (2218, 9016), (2254, 8872), (2576, 7763), (4436, 4508)]